Matches · 2026-10-11 · rules version c4

Mercury Decide vs GPT-6 Luna Pro

Mercury Decide won in 12 turns · 4 min wall clock · 158,176 tokens · $0.022

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Decisions

1. Team preview
   Mercury Decide brought Dragapult,garchomp,metagross5,452 tok · 1.7 s · $0.0001

   Lead: 66% BRING: dragapult, 11% BRING: metagross, 10% BRING: rotomwash Pick 2: 37% BRING: garchomp, 29% BRING: metagross, 16% BRING: scizor Pick 3: 52% BRING: metagross, 19% BRING: scizor, 19% BRING: rotomwash

   GPT-6 Luna Pro brought Rotomwash,primarina,garchomp10,651 tok · 25.0 s · $0.0019

   Rotom-Wash is the safest lead, with Primarina covering opposing Garchomp and Dragapult while Garchomp pressures their Steel-types and Rotom-Wash. This trio gives the broadest matchup coverage against the opponent’s likely picks.

   Reasoning trace (82 words)

   **Evaluating team matchups**
   
   I’m considering Gholdengo and its strength against Toxapex and steel types. Garchomp can handle steel types, while Dragapult could be checked by Kingambit, suggesting I should include Kingambit instead of Primarina. So, a potential team could be Garchomp, Rotom, and Kingambit. 
   
   Fighting opposing Garchomp physically might work best with Rotom’s hydro moves. However, I wonder about the risk of Will-O-Wisp from Kingambit. Primarina can check Dragapult and is a solid choice, while Rotom could deal with Scizor and Metagross.

2. Turn 1
   Mercury Decide used Dracometeor1,363 tok · 0.6 s · $0.0000

   86% MOVE: dracometeor, 7% MOVE: shadowball, 3% MOVE: phantomforce

   GPT-6 Luna Pro used Voltswitch7,028 tok · 13.1 s · $0.0011

   Choice Scarf lets Rotom-Wash move before Dragapult, so Volt Switch can preserve momentum before Dragapult attacks. Its damage is resisted, but pivoting is more useful here than committing to a weak attack.

   Reasoning trace (152 words)

   **Evaluating move strategy**
   
   I need to make a choice here. With Rotom’s scarf speed at 226.5, it outpaces Dragapult’s max of 213, but there’s the constraint of being locked into a move. I’m considering using Trick to cripple an item, but Dragapult might attack first. If I exchange the scarf, I might not know what item Dragapult has, which is important. I wonder if it could U-turn, and I’m feeling uncertain about how to gain momentum effectively. Switch options seem tricky!**Considering move options**
   
   I’m thinking about using Volt Switch, which lets me observe the opponent's move before I send out an appropriate counter. However, the opponent can switch too, which complicates things. If they bring in Garchomp, Volt Switch might not be very effective. Then there's Trick, which doesn’t do damage but has its utility. I need to decide quickly on speed and the best pivot strategy to handle this situation effectively!

   GPT-6 Luna Pro switched to Primarina5,840 tok · 7.0 s · $0.0007

   Primarina is immune to Dragapult’s Dragon attacks and threatens it with Moonblast. That favorable matchup makes it the best switch.

   Reasoning trace (71 words)

   **Choosing the right switch**
   
   I need to make a switch in my strategy. Dragapult is likely to attack with speed, but Primarina has immunity to dragon moves, making it a solid choice. While Garchomp poses a threat with dragon claw, its speed isn’t as confident against Dragapult. Given Primarina's ability to threaten with moonblast, switching to it seems to be the best decision here. I’ll go with Primarina for this matchup!

3. Turn 2
   Mercury Decide switched to Metagross1,538 tok · 0.6 s · $0.0000

   42% SWITCH: metagross, 32% MOVE: phantomforce, 15% MOVE: shadowball

   GPT-6 Luna Pro used Moonblast6,921 tok · 10.5 s · $0.0009

   Moonblast is super effective and likely knocks out the weakened Dragapult. Its Draco Meteor is also harmless into Primarina’s Fairy typing.

   Reasoning trace (81 words)

   **Calculating moonblast effectiveness**
   
   I need to figure out if a moonblast from Primarina can likely score an OHKO on Dragapult. Primarina has a 195 Special Attack with a Life Orb, and Dragapult is at 68% HP. Since fairy moves are super effective against it, I think the calculated damage is around 140-165, which seems promising against Dragapult's Special Defense. Even if it doesn't score a knockout, it should still be a significant threat, so using it is probably a good idea!

4. Turn 3
   Mercury Decide used Meteormashmega1,941 tok · 0.8 s · $0.0000

   64% MOVE: meteormash [MEGA], 18% SWITCH: garchomp, 14% MOVE: meteormash

   GPT-6 Luna Pro switched to Rotom7,696 tok · 12.7 s · $0.0011

   Primarina is slower than Metagross and its Fairy attack is resisted. Switch to Choice Scarf Rotom-Wash, which can outspeed Metagross and threaten it with Hydro Pump.

   Reasoning trace (86 words)

   **Determining battle strategy**
   
   I need to choose between options. Metagross is at 60%, and I think Primarina is slower, but steel hits are definitely super-effective. Garchomp could threaten with an Earthquake, though Metagross might resist an attack. Primarina resists steel, but its health from previous Moonblast attempts is concerning. I want to consider Rotom-Wash as a strong option with Hydro Pump. The speed from a Choice Scarf might give me the edge. Overall, I’ll need to decide on my switch carefully based on matchup and speed.

5. Turn 4
   Mercury Decide used Zenheadbutt1,598 tok · 0.5 s · $0.0000

   76% MOVE: zenheadbutt, 17% SWITCH: garchomp, 4% MOVE: stealthrock

   GPT-6 Luna Pro switched to Garchomp8,095 tok · 10.9 s · $0.0012

   Garchomp threatens a super-effective Earthquake against the weakened Metagross and is healthy enough to take a hit if Metagross moves first. Switching is the best way to apply immediate pressure.

   Reasoning trace (77 words)

   **Considering Rotom's strategy**
   
   I'm thinking about how Rotom's Hydro Pump could deal damage, and I need to consider its resistance to steel. Trick could potentially cripple Mega Metagross, but I’m not sure it will work if it's already holding a mega stone since items can't be swapped after mega evolution. I might want to switch in Garchomp to use Earthquake since it threatens super effective damage and can tolerate a hit, but I must consider Metagross's speed.

6. Turn 5
   Mercury Decide used Meteormash1,665 tok · 0.6 s · $0.0000

   85% MOVE: meteormash, 9% SWITCH: garchomp, 4% MOVE: zenheadbutt

   GPT-6 Luna Pro used Earthquake7,696 tok · 13.1 s · $0.0011

   Earthquake is super effective and should knock out Metagross at its current HP if Garchomp moves first. Speed is uncertain, but Garchomp may survive a hit, so attacking is better than giving Metagross a free turn.

   Reasoning trace (167 words)

   **Calculating earthquake KO chances**
   
   I need to analyze whether Earthquake will knock out the opponent. Metagross has about a 47% chance, while Garchomp has 182 attack. If Mega Metagross is involved, its high defense matters. I estimate the damage: at level 50, the attack against defense could be around 102 damage, leading to a probable KO. If Garchomp is faster, it could hit first to secure the knockout, but if not, Zen Headbutt might pose a risk since it's effective against Garchomp.**Evaluating attack strategies**
   
   I’m considering using Zen Headbutt, which has an attack of 216. Without Tough Claws, it becomes neutral against Garchomp, but it could still do around 100 damage, potentially leading to a knockout. The risk here is the speed; should I attack or switch instead? Rotom resists steel and is immune to ground. If Metagross hits first with Zen Headbutt, I may need to prioritize switching to Rotom to avoid being knocked out by Earthquake from Garchomp, which is strong and could outspeed me.

   GPT-6 Luna Pro switched to Rotom6,520 tok · 9.1 s · $0.0008

   Rotom-Wash is the better switch: it resists Meteor Mash and its Choice Scarf gives it the speed to threaten the weakened Metagross next turn. Primarina is vulnerable to Steel attacks.

   Reasoning trace (74 words)

   **Choosing a switch**
   
   I’m deciding between switching to Metagross or Rotom Wash. Primarina resists steel attacks, while Rotom Wash neutralizes them as well. With Rotom holding a scarf, it likely outpaces Mega Metagross, which has a max speed of 178. On the other hand, Primarina's speed is only 80, making it slower and more vulnerable to steel moves. I believe switching to Rotom Wash is the best option here due to its favorable matchup.

7. Turn 6
   Mercury Decide switched to Garchomp1,712 tok · 0.6 s · $0.0000

   82% SWITCH: garchomp, 10% SWITCH: dragapult, 6% MOVE: zenheadbutt

   GPT-6 Luna Pro used Thunderbolt9,405 tok · 22.8 s · $0.0018

   Choice Scarf makes Rotom-Wash faster than Mega Metagross, so it can attack before Metagross moves. Thunderbolt is the reliable play and should finish Metagross at 35% HP without Hydro Pump’s accuracy risk.

   Reasoning trace (153 words)

   **Analyzing battle moves**
   
   I need to choose a move for Rotom against Metagross. With Metagross at 35%, I’m considering Hydropump, but it's risky due to its 80% accuracy. Thunderbolt is more reliable and might deal about 40-50%, but I wonder if it can KO. Hydropump has a higher KO chance but is less dependable. Also, if I Volt Switch to Primarina, it might resist the incoming attack better. I feel like analyzing strengths and weaknesses is crucial here!**Calculating Thunderbolt effectiveness**
   
   I’m considering using Thunderbolt because it could likely knock out Metagross. Based on my damage calculations, it seems like at 157 Special Attack against Metagross's 140 Special Defense, it could deal around 82-97 damage, which is about 48-57%. So, it should comfortably KO if Metagross is at 35% health with only 65 HP left. Speed is crucial too—Rotom could outspeed unless Mega Metagross has max speed. Thunderbolt feels like the safest choice here!

8. Turn 7
   Mercury Decide used Dragonclaw1,452 tok · 0.6 s · $0.0000

   35% MOVE: dragonclaw, 35% MOVE: stoneedge, 27% MOVE: swordsdance

   GPT-6 Luna Pro switched to Primarina6,648 tok · 7.6 s · $0.0008

   Rotom-Wash is Choice-locked into Thunderbolt, which has no effect on Garchomp. Switch to Primarina to escape the bad matchup and threaten Garchomp with Moonblast.

   Reasoning trace (73 words)

   **Considering switch options**
   
   I need to choose whether to switch to Primarina. Garchomp is immune to electric moves like Thunderbolt, which makes it a tough opponent. Primarina resists Dragon types and can threaten Garchomp with Moonblast, but I have to keep in mind that Garchomp's Earthquake could be very dangerous. Still, Primarina's Water/Fairy typing gives it a decent chance to survive. Given the choice lock situation, I think it's best to switch out.

9. Turn 8
   Mercury Decide used Earthquake1,467 tok · 0.6 s · $0.0000

   78% MOVE: earthquake, 11% MOVE: stoneedge, 6% MOVE: swordsdance

   GPT-6 Luna Pro used Moonblast7,324 tok · 10.8 s · $0.0010

   Moonblast is the best play: it hits the faster Garchomp super effectively and also punishes a switch to Dragapult. Primarina is immune to the revealed Dragon Claw, so there’s little reason to switch out.

   Reasoning trace (77 words)

   **Analyzing Moonblast effectiveness**
   
   I’m considering whether Moonblast can likely score an OHKO against Garchomp with Primarina’s special attack from full health. Standard Garchomp sits around 215 HP, with a special defense range that may not guarantee the knockout. I recognize that Primarina is safe from Dragon Claw and can threaten Garchomp pretty directly. The switch could be to Metagross, which resists Fairy, but Moonblast would still be a solid option. Speed factors are important to consider here.

   Mercury Decide switched to Dragapult1,228 tok · 0.5 s · $0.0000

   87% SWITCH: dragapult, 13% SWITCH: metagrossmega

10. Turn 9
    Mercury Decide used Shadowball1,512 tok · 0.6 s · $0.0000

    74% MOVE: shadowball, 24% MOVE: phantomforce, 1% MOVE: dracometeor

    GPT-6 Luna Pro used Moonblast9,206 tok · 19.5 s · $0.0015

    Moonblast is super effective and should knock out Dragapult from 68% if Primarina gets to move. Primarina is much slower, but the revealed Draco Meteor cannot hit it because Fairy is immune to Dragon.

    Reasoning trace (258 words)

    **Assessing battle strategy**
    
    I need to consider the moves of Dragapult and Primarina. Dragapult's Draco Meteor has a chance to knock out Primarina, but since Primarina is immune to Dragon-type moves, it wouldn't be affected. I wonder if Moonblast could be a better choice since Dragapult is faster and Primarina is at low health.
    
    Estimating damage, with my calculations, Moonblast could deal significant damage to Dragapult. However, Dragapult might use a Ghost-type attack like Shadow Ball to KO Primarina first. Should I switch out Rotom safely?**Evaluating battle strategy with Rotom and Dragapult**
    
    I need to analyze my options with Rotom, which is holding a Choice Scarf. It will outspeed Dragapult. With Thunderbolt, though strong, it may not secure a knockout since Dragapult is at 68%. I could also consider using Trick, but staying with Primarina seems better if Dragapult uses a Dragon move since it's immune.
    
    The safest switch seems to be Rotom, but it could face a Draco Meteor, which Primarina dodges. If Dragapult uses a Ghost move, Primarina might go down. Maximizing speed and damage is key. Should I stick with my original plan?**Considering Dragapult's mega evolution**
    
    It looks like the opponent might have mega evolved their Dragapult. If that's the case, I wonder if Rotom's Thunderbolt could potentially score a two-hit knockout. However, I should also be cautious because Dragapult could counterattack if I’m not careful. I really need to evaluate if this strategy will hold up against a mega-evolved Dragapult. Planning my next move will be crucial to maintain an advantage in the battle.

    GPT-6 Luna Pro switched to Rotom6,881 tok · 8.0 s · $0.0009

    Rotom-Wash is the only legal action and preserves your last Pokémon. Its Choice Scarf also gives it a chance to outspeed Dragapult next turn.

    Reasoning trace (84 words)

    **Analyzing battle strategy**
    
    I need to focus on choosing only to switch. I know that a Rotom with a scarf has a speed of 151, while Dragapult is likely faster, estimating between 145 and 213. With a scarf, Rotom can reach 226 and outspeed. Thunderbolt against a 58% Dragapult will likely score a KO, as Rotom has a special attack (spa) of 157. The damage range seems to be around 100-120, making a potential KO depending on Dragapult's bulk. Switching is my best option.

11. Turn 10
    Mercury Decide used Dracometeor1,466 tok · 0.5 s · $0.0000

    60% MOVE: dracometeor, 28% MOVE: shadowball, 6% MOVE: phantomforce

    GPT-6 Luna Pro used Trick10,175 tok · 25.8 s · $0.0019

    Choice Scarf makes Rotom-Wash faster than Dragapult, so Trick acts first. It removes Life Orb and can lock Dragapult into its selected move, making this the strongest play.

    Reasoning trace (80 words)

    **Evaluating speed and strategy**
    
    I’m checking the speeds: Rotom with a scarf hits 226, and Dragapult ranges from 145 to 213. That means the scarf Rotom is definitely faster! It's interesting that using Trick can lock Dragapult into its chosen move, which could be crucial. Normally, a choice item lock kicks in after the next move. I wonder if using a life orb with Rotom might also be a good strategy. Overall, it sounds like Rotom has a solid advantage!

12. Turn 11
    Mercury Decide used Dracometeor1,388 tok · 0.5 s · $0.0000

    95% MOVE: dracometeor, 5% SWITCH: metagrossmega

    GPT-6 Luna Pro used Trick12,042 tok · 36.6 s · $0.0025

    Dragapult is Choice-locked into Draco Meteor at -2, so Trick can steal its Scarf and remove its speed advantage if Rotom survives the hit. Rotom is at risk of being knocked out, but attacking into its resistance is unlikely to finish it.

13. Turn 12
    Mercury Decide used Shadowball1,628 tok · 0.6 s · $0.0000

    57% MOVE: shadowball, 24% MOVE: dracometeor, 13% MOVE: phantomforce

    GPT-6 Luna Pro used Thunderbolt10,638 tok · 28.4 s · $0.0019

    Rotom’s Choice Scarf makes it faster than this Life Orb Dragapult, so it can attack first. Thunderbolt is the strongest reliable option, though Dragapult resists it.

    Reasoning trace (68 words)

    **Considering item strategies**
    
    I'm thinking about a trick swap, where I might exchange a scarf for a life orb. But if I'm at 1 HP, then Dragapult might just attack. The trick itself wouldn’t really help in combat and could lead to losing the match. It’s a tricky situation with Thunderbolt involved. I wonder if there’s a better strategy I could use here to avoid getting knocked out!