Matches · 2026-10-10 · rules version c3
Mercury Decide vs GPT-OSS 20B
GPT-OSS 20B won in 5 turns · 66 s wall clock · 27,150 tokens · $0.000
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Decisions
- Team previewMercury Decide brought
Dragapult,metagross,garchompLead: 58% BRING: dragapult, 15% BRING: metagross, 10% BRING: scizor Pick 2: 38% BRING: metagross, 23% BRING: garchomp, 20% BRING: scizor Pick 3: 51% BRING: garchomp, 35% BRING: scizor, 11% BRING: rotomwash
GPT-OSS 20B broughtBlastoise,gengar,toxapexBlastoise’s Rapid Spin removes Stealth Rock before it can damage us, and its Water moves beat Rotomwash. Gengar’s Ghost/Poison coverage handles Steel and is fast. Toxapex’s bulk and Toxic Spikes pressure the opponent and can survive the early onslaught. This trio covers the main threats and gives a strong counter‑attack.
Reasoning trace (570 words)
We need to choose 3 Pokémon to bring. We want best team composition. Consider opponent's team: Garchomp, Scizor, Metagross, Rotomwash, Dragapult, Toxapex. We have Rotomwash, Toxapex, Garchomp, Blastoise, Gengar, Steelix. We need to consider matchups. Rotomwash is weak to Garchomp (ground), but has water/electric. Toxapex is good against many, but weak to Garchomp? Toxapex is Poison/Water, Garchomp is Dragon/Ground, neutral. Toxapex can set toxic spikes, recover. Garchomp is strong, but we have a Garchomp with Garchompite, sandveil. We can use it to beat Garchomp? Actually same type, but our Garchomp has higher stats. But opponent's Garchomp is 108 HP, ours 185 HP, so we can beat it. But opponent also has Scizor (Bug/Steel), Metagross (Steel/Psychic), Dragapult (Dragon/Ghost), Rotomwash (Electric/Water), Toxapex (Poison/Water). We need coverage. Rotomwash: can use Thunderbolt, Voltswitch, Hydropump, Raindance. Good against Steel (Scizor, Metagross, Steelix). But Rotomwash is weak to Garchomp (ground). But we can bring Rotomwash as a backup. Toxapex: good against Steel and Dragon? Toxapex has high defense, can set toxic spikes, recover. Good against Scizor, Metagross, Rotomwash? Rotomwash is Electric/Water, Toxapex is Poison/Water, so neutral. But Toxapex can survive. Garchomp: strong, can beat many. But opponent has Dragapult (Dragon/Ghost) which is 142 Speed, but Garchomp is 169 Speed, so outruns. Garchomp can beat Dragapult. Also beats Scizor, Metagross. But Garchomp is weak to Toxapex? Toxapex is Poison/Water, Garchomp is Dragon/Ground, neutral. But Garchomp can beat Toxapex? Toxapex has high defense, but Garchomp has high attack. But Toxapex can set toxic spikes. Blastoise: Water type, can beat Rotomwash (Electric/Water). But Rotomwash is 86 Speed, Blastoise 98 Speed. But Rotomwash has Electric moves. Blastoise can use Ice Beam to beat Garchomp? No. But Blastoise can use Rapid Spin to remove Stealth Rock. But we don't have Stealth Rock on our side. But opponent may set Stealth Rock? They have Stealth Rock moves: Steelix has Stealth Rock, Garchomp has Stealth Rock, etc. So we need to remove Stealth Rock. Blastoise can remove with Rapid Spin. But we don't have Rapid Spin? Yes, Blastoise has Rapid Spin. So we can bring Blastoise to remove Stealth Rock. But we need to consider that opponent may set Stealth Rock before we can spin? They can set on turn 1. We can spin on turn 1 to remove. That is good. Gengar: Ghost/Poison, can beat Steel (Scizor, Metagross, Steelix) with Ghost moves. Also can beat Rotomwash? Rotomwash is Electric/Water, Gengar is Ghost/Poison, so neutral. But Gengar can use Shadow Ball, Sludge Bomb, Focus Blast. Focus Blast is Fighting, but not needed. Gengar can use Nasty Plot to boost. But we need to consider that Gengar is 178 Speed, so fast. Good. Steelix: Steel/Ground, can beat Garchomp? Garchomp is Dragon/Ground, Steelix is Steel/Ground, so Steel moves are super effective? Steel moves vs Ground? Steel is neutral to Ground. But Steelix can use Iron Head (Steel) which is super effective vs Garchomp? Garchomp is Dragon/Ground, Steel is not super effective. But Steelix can use Stone Edge (Rock) which is super effective vs Garchomp? Garchomp is Dragon/Ground, Rock is not super effective. But Steelix can use Earthquake (Ground) which is neutral. But Steelix can set Stealth Rock. But we might not want to bring Steelix because we can bring Gengar to beat Steel. But Steelix can also beat Garchomp? No. We need to consider opponent's team: Garchomp (Dragon/Ground), Scizor (Bug/Steel), Metagross (Steel/Psychic), Rotomwash (Electric/Water), DragapultThinking budget reached. Stop thinking and give your final answer now.
- Turn 1Mercury Decide used
Dracometeor84% MOVE: dracometeor, 8% MOVE: phantomforce, 4% MOVE: shadowball
GPT-OSS 20B usedShellsmashDragapult is fast and will move first; we cannot KO it in one hit with either move. Switching to a Pokémon that can set hazards or boost attack is better. Shellsmash boosts Blastoise’s attack for the next turn, giving us a stronger attack if Dragapult uses a non‑special move.
Reasoning trace (617 words)
We need to decide best action. Blastoise vs Dragapult. Dragapult unknown moves. We have options: hydropump, icebeam, rapidspin, shellsmash, switch to gengar or toxapex. We need to consider speed, damage, potential KO. Dragapult is fast (142). Blastoise speed 98. So Dragapult will move first. We don't know its moves. Likely it will use a strong move like Draco Meteor, Shadow Ball, or something. We need to consider that Dragapult is a Dragon/Ghost, so it resists Water? Dragon resists Water? Water is not super effective on Dragon. Ghost is immune to Normal and Fighting. So Water moves are not super effective. Ice moves are super effective on Dragon (2x). Ice moves are also super effective on Dragon, but not on Ghost. So IceBeam could do 2x damage. Dragapult's speed is high, but we can use rapidspin to remove hazards, but none present. Shellsmash is a status move that boosts attack and special attack but also lowers defense. Not useful. Hydropump is 110 power, 0.8 accuracy. IceBeam is 90 power, 100% accuracy. Dragapult's HP is 88. Blastoise's HP 186. We need to consider if we can KO Dragapult with IceBeam? Dragapult's defense: base 75, but we don't know its EVs. Likely 0. IceBeam 90 power, STAB? IceBeam is not STAB for Blastoise. So 90 power. Dragapult's defense 75. Damage calculation: 90 * (186/75?) Wait formula: Damage = (((2*Level/5+2)*Power*Attack/Defense)/50)+2. Attack of Blastoise is 92. So 2*50/5+2 = 22. 22*90*92/75/50+2. 22*90=1980. 1980*92=182160. /75=2429.6. /50=48.592. +2=50.592. So about 51 damage. Dragapult HP 88. So one IceBeam won't KO. Hydropump 110 power, 0.8 accuracy. Attack 92. Damage: 22*110*92/75/50+2. 22*110=2420. *92=222640. /75=2968.53. /50=59.37+2=61.37. So about 61 damage. Still not KO. So we can't KO Dragapult in one hit. We might need to switch or use a different move. We could use rapidspin to remove hazards but none. We could use shellsmash to boost attack for next turn. But we don't know what Dragapult will do. We could switch to a more resistant or faster Pokémon. Gengar is Ghost/Poison, speed 178, can use Shadow Ball or Focus Blast. Gengar has high special attack 182. Dragapult is Ghost/Dragon. Gengar's Ghost moves are super effective on Dragapult? Dragapult is Ghost type, so Ghost moves are not super effective? Ghost vs Ghost is 0.5x? Actually Ghost vs Ghost is 0.5x. So Gengar's Ghost moves are not super effective. Poison moves? Dragapult is not Poison. So Gengar's moves are not super effective. But Gengar can use Focus Blast (Fighting) which is 2x? Dragapult is Ghost/Dragon, so Fighting is 2x? Ghost is immune to Fighting? Wait Ghost is immune to Fighting? Actually Ghost is immune to Fighting? No, Ghost is immune to Fighting? Wait Ghost is immune to Fighting? I think Ghost is immune to Fighting? No, Ghost is immune to Fighting? Actually Ghost is immune to Fighting? I recall Ghost is immune to Fighting? Let's recall: Ghost is immune to Fighting? Yes, Ghost is immune to Fighting. So Focus Blast would be 0.5x? Wait Fighting vs Ghost: Ghost is immune to Fighting, so 0x. So Focus Blast would do nothing. So Gengar is not good. Toxapex is Poison/Water, speed 55, but has high defense. Toxapex can set hazards, but Dragapult is fast. Toxapex's moves: Baneful Bunker (status), Recover, Toxic Spikes, Haze. None do damage. So Toxapex is not good for offense. So maybe we should keep Blastoise. We could use rapidspin to remove hazards if any appear later. But currently none. Shellsmash could boost attack for next turn. But we don't know what Dragapult will do. We could use hydropump to try to damage. But we can't KO. We could use icebeam to try to do 2x. But stillThinking budget reached. Stop thinking and give your final answer now.
- Turn 2Mercury Decide switched to
Garchomp43% SWITCH: garchomp, 21% MOVE: phantomforce, 18% MOVE: uturn
GPT-OSS 20B usedIcebeamDragapult is faster, but Ice Beam (2× vs Dragon) will KO it before it can act, even with Life Orb. No need to boost or switch.
Reasoning trace (280 words)
We need to decide best action. Opponent Dragapult has Life Orb, used Draco Meteor, now at 90/100 HP. Our Blastoise has 83/186 HP, boosted ATK+2, SPA+2, SPE+2, but def-1, spd-1. Dragapult has high speed 142, high special attack 100, but its special attack is -2 from Shell Smash. So its effective SPA is 98. Dragapult's type: Dragon/Ghost, so weak to Ice (4x). Ice Beam is 90 BP, 100% accuracy, 4x weak to Dragapult? Wait Dragapult is Dragon/Ghost, Ice is super effective 2x? Actually Ice is 2x effective against Dragon, 2x effective against Flying, 2x effective against Grass, 2x effective against Ground. Ghost is immune to normal and fighting. So Ice vs Dragapult: 2x. So Ice Beam would do 90*2=180 base damage. With our Blastoise's SPA 150 +2 = 152? Wait Blastoise's SPA is 150, +2 boost = 152. So damage ~152*2=304 base. With STAB? Blastoise is Water type, Ice is not STAB. So 304. Dragapult has 90 HP, so Ice Beam would KO. But Dragapult has Life Orb, so damage increases 1.3x. So 304*1.3=395. So Ice Beam would definitely KO. Also Dragapult's speed is high, but we can KO before it moves. So best action: Ice Beam. But we must consider that Dragapult has Life Orb, but we can still KO. Also we might consider using Shell Smash to boost our stats, but that would allow Dragapult to move after. But we can KO with Ice Beam. So best action: Ice Beam. Thus <thought> speed: Dragapult is faster, but Ice Beam will KO before it moves. So we choose Ice Beam. We must output exactly one action line: MOVE: icebeam Check legal actions: 3: MOVE: icebeam. So output that.
Mercury Decide switched toMetagross88% SWITCH: metagross, 12% SWITCH: dragapult
- Turn 3Mercury Decide used
Meteormashmega72% MOVE: meteormash [MEGA], 16% MOVE: meteormash, 4% MOVE: zenheadbutt [MEGA]
GPT-OSS 20B usedShellsmashBlastoise is faster and can set up a Shell Smash to boost its damage for the next turn. Metagross’s unknown move is likely a strong attack; with Shell Smash we’ll still move first and can survive a hit while gaining a huge damage boost.
Reasoning trace (617 words)
We need to decide best action. Blastoise vs Metagross. Metagross is 100% HP, unknown moves. Blastoise has boosts: ATK +2, SPA +2, SPE +2, DEF -1, SPD -1. So speed: Blastoise base 78? Actually base 78. With +2, speed 98? Wait base 78 +2 = 80? Actually +2 means +2 stages, each stage 10%? So 78*1.2=93.6. Metagross base 65? Actually Metagross base 55? Wait base 55? Actually Metagross base 55? Let's recall: Metagross base stats: HP 80, Attack 135, Defense 130, Sp. Attack 95, Sp. Defense 90, Speed 70. So speed 70. With Blastoise speed 93.6 > 70. So Blastoise will move first. Good. We want to KO Metagross. Blastoise's moves: hydropump 110, icebeam 90. Metagross is Steel/Psychic. Water is 2x weak? Actually Steel is 0.5 to Water? Wait Water is 2x weak to Steel? No, Water is 2x weak to Steel? Actually Steel resists Water 0.5. So Water is not super effective. Ice is 2x weak to Steel? Ice is 2x weak to Steel? Ice is 2x weak to Steel? Actually Steel resists Ice 0.5. So Ice is not super effective. So both moves are not super effective. But we can still do damage. Metagross has high HP 80. Blastoise's hydropump 110 * 1.2 (boost) = 132. But with 0.5 resistance, damage ~66. So not enough to KO. Icebeam 90 * 1.2 = 108, with 0.5 resistance = 54. So not enough. But we can use shellsmash to boost attack and special and speed further. Shellsmash gives +2 ATK, +2 SPA, +2 SPE, but also lowers defense and special defense. That would increase damage. After shellsmash, attack and special become +4? Wait currently +2. Shellsmash adds +2 to each, so total +4. So hydropump would be 110 * 1.4 = 154. With 0.5 resistance = 77. Still not enough. Icebeam 90 * 1.4 = 126, half = 63. Not enough. But maybe we can use rapidspin to remove hazards? No hazards. We could also switch to Gengar or Toxapex. Gengar is Ghost/Poison, can use Shadow Ball 80, but Metagross is Steel/Psychic, Ghost is 1x? Ghost is 1x to Steel? Ghost is 1x to Steel. Poison is 1x to Steel? Poison is 1x to Steel. So no advantage. But Gengar has high special attack 182, but Metagross has 95 special defense. So Shadow Ball 80 * 1.4 = 112, no resistance? Metagross is Steel/Psychic, Ghost is 1x, Poison 1x. So damage 112. Not enough. But Gengar can use Focus Blast 120, but Metagross is Steel, so 0.5 resistance. So 120 * 1.4 = 168, half = 84. Not enough. Gengar can use Nasty Plot to boost special. But we only have one turn. So not enough. Toxapex has high defense, but not good for damage. So we might want to use Shell Smash to boost damage and then use Hydropump next turn. But we only have one turn. But maybe we can use Shell Smash now to set up for next turn. But we might risk being hit by Metagross's unknown move. But Metagross's unknown move could be something like Meteor Mash (physical) or Zen Headbutt (psychic). With Shell Smash, we lower defense and special defense, making us vulnerable. But we are faster, so we will move first. But if Metagross uses a strong move, we might get KOed. But we can still survive? Metagross has 80 HP. If it uses Meteor Mash (physical) 120, with Blastoise's defense 120 -1 = 119? Actually defense -1 reduces to 108? Wait base defense 120, -1 stage = 108. Attack 135. So damage: 120 * 1.0? Actually Meteor Mash has 120 base, 1.0? It's 120. So damage: 120 * 1.0?Thinking budget reached. Stop thinking and give your final answer now.
- Turn 4Mercury Decide used
Meteormash59% MOVE: meteormash, 17% MOVE: bulletpunch, 12% MOVE: zenheadbutt
GPT-OSS 20B usedHydropumpMetagross is 80 HP and has no type advantage against Blastoise’s special moves. Hydropump (110 BP) with +4 SPA will almost certainly KO it, while Ice Beam is weaker and Hydropump’s 80 % accuracy is acceptable. Switching would waste a turn and give Metagross a free hit.
Reasoning trace (596 words)
We need to decide best action. We have Blastoise active, Metagross active. We have options: hydropump, icebeam, rapidspin, shellsmash, or switch to gengar or toxapex. We need to consider best action. Let's analyze. Metagross is Steel/Psychic, 100% HP. Moves: meteormash. It has toughclaws, so physical attack. Blastoise has high special attack. Metagross is 80 HP. Blastoise has 83 HP. So we are close. We want to finish Metagross. Hydropump is 110 base power, 80% accuracy. Icebeam is 90 base power, 100% accuracy. We need to consider type matchups: Metagross is Steel/Psychic. Water is 2x weak? Water is super effective against Steel? Water is 2x effective against Steel? Actually Water is 2x effective against Steel? Wait: Water is super effective against Steel? Let's recall type chart: Water is super effective against Fire, Ground, Rock. Not Steel. So Water is neutral to Steel. Ice is super effective against Steel? Ice is super effective against Dragon, Flying, Grass, Ground. Not Steel. So Ice is neutral to Steel. So both are neutral. Psychic is weak to Fighting, Poison, Bug? Actually Psychic is weak to Bug, Ghost, Dark? Wait: Psychic is weak to Bug, Ghost, Dark. So no. So no type advantage. So we need to consider damage. Hydropump 110 vs 80 HP. With boosts: Blastoise has +4 ATK, +4 SPA. So special attack is 150 + 4 = 154? Wait base SPA 150, boost +4 => 154? Actually each +1 boost increases by 10%? Wait in Gen 9, each boost is 10%? Actually each stage is 10%? Wait: In Gen 9, each boost is 10%? Let's recall: In Gen 9, each stage is 10%? Actually it's 10% per stage? Wait: In Gen 9, each stage is 10%? Actually it's 10%? Let's recall: In Gen 9, each stage is 10%? Wait: In Gen 9, each boost is 10%? Actually it's 10%? I'm not sure. But we can approximate. But we can consider that Hydropump 110 base, with +4 SPA, might do ~110 * 1.4 = 154. Icebeam 90 base, +4 SPA => 90 * 1.4 = 126. So Hydropump does more damage. But accuracy 80% vs 100%. But we can risk. We need to consider that Metagross has 80 HP. So Hydropump might KO. But we also have Shellsmash to boost stats. But we are at 83 HP, so we might want to finish. But we also have the option to switch to Gengar or Toxapex. Gengar is Ghost/Poison, 137 HP, 178 Speed, 182 Special Attack. Gengar has high speed, can use Shadow Ball or Focus Blast. But we need to consider that Metagross is 80 HP. Gengar can KO with Shadow Ball? Shadow Ball 80 base, +4 SPA? Gengar's SPA 182 +4 => 202? Actually 182 base, +4 => 202? So 80 * 1.4 = 112. So Gengar's Shadow Ball would do ~112, enough to KO. But Gengar is 137 HP, so we can switch in. But we might want to finish quickly. But we also have Toxapex, 157 HP, 55 Speed, 194 Defense, 75 Special Attack. Toxapex is slower, but can set hazards. But we might want to finish Metagross. So best action: Hydropump. But we need to consider that Metagross has toughclaws, but that only affects physical moves. So no effect on special. So Hydropump is good. But we also have the possibility of using Shellsmash to boost stats for future. But we are at 83 HP, so we might want to finish. But we also have the possibility of using RapidSpin to remove hazards, but we have none. So best action: Hydropump. So we choose "MOVE: hydropump".
Mercury Decide switched toDragapult100% SWITCH: dragapult
- Turn 5Mercury Decide used
Dracometeor88% MOVE: dracometeor, 6% MOVE: phantomforce, 3% MOVE: shadowball
GPT-OSS 20B usedHydropumpHydropump will KO Dragapult (≈192 dmg vs 79 HP) before it can hit back. Dragapult moves first but its dracometeor only does ~177, so Blastoise survives. No better move exists.
Reasoning trace (443 words)
We need to choose best action. Our active is Blastoise with boosts: ATK+4, SPA+4, SPE+4, DEF-2, SPD-2. Opponent Dragapult has high speed 142, high special 100, attack 120. Dragapult's move dracometeor (130) is super effective? Dragapult is Dragon/Ghost; Blastoise is Water. Dragon moves are not super effective to Water. Ghost moves are not super effective to Water. So dracometeor is neutral to Blastoise. Blastoise's hydropump is 110, but with SPA+4, damage increased. Dragapult's speed is high, but Blastoise has +4 speed, but still likely slower? Let's compute: Blastoise base speed 78 + 4 = 82. Dragapult base 142. So Dragapult is faster. So if we use hydropump, Dragapult will move first. But we might want to use rapidspin to remove hazards? No hazards. We might want to use shellsmash to boost attack? But we already have high attack. Shellsmash is a status move that boosts attack and special by 1 each? Actually shellsmash is a status move that boosts attack and special by 1 each, but also reduces defense and special defense by 1 each. That might be good to increase damage. But we already have high boosts. We could use shellsmash to further boost attack and special. But we might want to use icebeam to hit Dragapult for super effective? Ice is not super effective to Dragon/Ghost? Ice is not super effective to Dragon or Ghost. So no. Hydropump is neutral. Dracometeor is neutral. So we might want to use shellsmash to boost attack and special for next turn. But we might want to use hydropump now to try to KO Dragapult. Let's check HP: Dragapult 90% of 88 = 79.2 HP. Blastoise hydropump with boosts: Attack not used, special used. Base special 150 + 4 = 154. Damage formula: 110 * (154/100) * (??) * 0.85? Actually base damage: floor(((2*level/5+2)*power*att/spd)/50)+2. Level 50. So (2*50/5+2)= (20+2)=22. So 22*110*154/50 = 22*110*154/50 = 22*110*3.08 = 22*338.8 = 7449.6. /50 = 148.99. +2 = 150.99. Then apply STAB? Blastoise has Water type, hydropump is Water, so STAB 1.5. So 150.99*1.5=226.485. Then apply random 0.85-1.0. So 226.485*0.85=192.46. So about 192 damage. Dragapult has 79 HP. So hydropump will KO. So we can KO Dragapult with hydropump. Dragapult will move first, but we can still KO it. So best action: hydropump. We should consider that Dragapult might use dracometeor, which is 130 power. Dragapult's attack 120, but we have defense 120-2=118. Damage: 130*(120/118)/? Actually formula: 22*130*120/50=22*130*2.4=22*312=6864/50=137.28+2=139.28. STAB? dracometeor is Dragon, Dragapult is Dragon/Ghost, so STAB 1.5. So 139.28*1.5=208.92. Random 0.85-1.0 => 177.4. So dracometeor would do ~177 damage to Blastoise. Blastoise has 186 HP, so would survive. So we can safely use hydropump. Thus best action: hydropump.