Matches · 2026-10-11 · rules version c4

Claude Haiku 5.5 vs Mercury Decide

Mercury Decide won in 9 turns · 2 min wall clock · 63,102 tokens · $0.010

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Decisions

1. Team preview
   Mercury Decide brought Dragapult,garchomp,metagross5,627 tok · 1.8 s · $0.0001

   Lead: 51% BRING: dragapult, 17% BRING: metagross, 15% BRING: rotomwash Pick 2: 38% BRING: garchomp, 26% BRING: metagross, 20% BRING: rotomwash Pick 3: 51% BRING: metagross, 24% BRING: rotomwash, 17% BRING: scizor

   Claude Haiku 5.5 brought Incineroar,garchomp,gholdengo3,636 tok · 6.9 s · $0.0008

   Incineroar leads for Intimidate, Fake Out, and Parting Shot, and its Fire moves threaten Scizor and Metagross. Garchomp covers Rotom-Wash and Dragapult with Earthquake and Outrage. Gholdengo adds a strong special attacker that hits Toxapex with Thunderbolt and Dragapult with Shadow Ball.

   Reasoning trace (88 words)

   Looking at team preview against their Garchomp, Scizor, Metagross, Rotom-Wash, Dragapult, and Toxapex, I'm weighing which three of our six to bring. Incineroar seems like a solid lead with intimidate, fake out, and parting shot, while I'm considering how well Kingambit matches up against their threats despite its fairy weakness.
   
   Weighing Kingambit's sucker punch against Dark being only neutral vs their Steel types, versus Gholdengo's electric coverage hitting Toxapex and other water-types hard while Rotom-Wash resists it. Leaning toward Incineroar, Garchomp, and Gholdengo for the balanced coverage.
   
   

2. Turn 1
   Mercury Decide used Dracometeor1,402 tok · 0.5 s · $0.0000

   94% MOVE: dracometeor, 3% SWITCH: garchomp, 2% SWITCH: metagross

   Claude Haiku 5.5 used Partingshot3,314 tok · 7.4 s · $0.0008

   Fake Out can't hit Dragapult because it's Ghost-type, and Flare Blitz is resisted. Parting Shot cuts Dragapult's Attack and Special Attack and gets Incineroar out of range. Dragapult is faster, so no move here threatens a knockout.

   Reasoning trace (136 words)

   Right, Fake Out whiffs because Dragapult's Ghost typing blocks Normal moves entirely, and Flare Blitz is resisted by its Dragon side too. Since Dragapult outspeeds, I'm weighing Parting Shot to pivot into Gholdengo or Garchomp, though it's already down an attack stage so the value is limited.
   
   Checking matchups: Gholdengo's Steel typing resists Dragapult's Dragon Darts but its Ghost typing leaves it weak to Shadow Ball, while Garchomp takes double damage from Dragon moves but is fast enough to potentially outpace Dragapult and threaten back.
   
   Parting Shot seems like the right call here, setting up to bring in Gholdengo next turn since its Shadow Ball hits Dragapult super effectively and Life Orb gives it the power to back it up. Garchomp's weak to Dragon Darts, so Gholdengo's the better follow-up. I'll go with Parting Shot.
   
   

   Claude Haiku 5.5 switched to Gholdengo3,046 tok · 7.2 s · $0.0007

   Dragapult outspeeds both of my options and has already dropped to -3 SpA, so the risk is its Draco Meteor. Gholdengo is the better switch-in: Dragon hits it neutrally, while Dragapult's Dragon typing makes Garchomp take 2x. Shadow Ball is super effective on Dragapult and can threaten a knockout.

   Reasoning trace (128 words)

   Incineroar's stuck at 122/202 and Dragapult is at 90% with its attack and special attack both dropped. Since Dragapult outspeeds and only switching is available, I need to weigh Garchomp against Gholdengo given Dragapult's Dragon/Ghost typing and its weaknesses.
   
   Garchomp would take heavy damage from any Dragon-type move since it's doubly weak to Dragon itself, while Gholdengo's Steel typing takes Dragon attacks neutrally. But Gholdengo is itself part Ghost, so Dragapult's Ghost-type moves would hit it for double damage too, which complicates which switch is actually safer.
   
   Weighing speed and power, Gholdengo outpaces concerns since it's still faster in practice and its Life Orb-boosted Shadow Ball likely threatens Dragapult significantly, while its dual Steel/Ghost typing lets it shrug off Dragapult's weakened Draco Meteor. I'll go with Gholdengo.
   
   

3. Turn 2
   Mercury Decide used Phantomforce1,647 tok · 0.5 s · $0.0000

   65% MOVE: phantomforce, 21% MOVE: shadowball, 10% SWITCH: garchomp

   Claude Haiku 5.5 used Shadowball3,228 tok · 6.3 s · $0.0007

   Dragapult is faster and its Special Attack is at -3, so Draco Meteor hits much weaker than usual and Gholdengo should survive it. Shadow Ball is super effective on Dragon/Ghost and gets STAB and Life Orb, so it should knock Dragapult out. Nasty Plot would just give Dragapult another turn.

   Reasoning trace (91 words)

   Dragapult is at 90% with lowered attack and special attack, but still faster than Gholdengo, so its offensive stats are weakened while Gholdengo stays unboosted. Shadow Ball from Gholdengo would hit Dragapult super effectively given its Ghost typing.
   
   Running the numbers, Shadow Ball with STAB, the ghost-type weakness, and Life Orb could deal around 200+ damage, likely close to a KO even accounting for Dragapult's SpD range. Meanwhile Dragapult's Draco Meteor is neutral against Gholdengo's Steel/Ghost typing and further weakened by the SpA drop, so it shouldn't threaten much back.
   
   

4. Turn 3
   Mercury Decide used Phantomforce

   100% MOVE: phantomforce

   Claude Haiku 5.5 used Shadowball3,283 tok · 7.3 s · $0.0007

   Dragapult is faster, but its Sp. Atk is at -3, so its Draco Meteor is weak. Shadow Ball is super effective on Dragapult (Ghost vs. Ghost), and Gholdengo's boosted Sp. Atk with Life Orb should likely knock out the 90% HP target. Shadow Ball is the best option.

   Reasoning trace (79 words)

   With Dragapult's stat drops, its Draco Meteor and Phantom Force are both weakened, giving Gholdengo an edge despite the speed deficit. I'm checking whether Shadow Ball would hit Dragapult super effectively given its typing.
   
   That explains the miss—Phantom Force's evasive phase dodged it, and now Dragapult is back and vulnerable. With Gholdengo's solid Defense, Phantom Force at a lowered Attack stage isn't too threatening, so sticking with Shadow Ball again is the right call given its reliable accuracy.
   
   

   Claude Haiku 5.5 switched to Garchomp2,788 tok · 11.0 s · $0.0006

   Gholdengo fainted, so I must switch. Garchomp is at full HP and outspeeds or matches Dragapult, and Outrage hits Dragapult for super-effective damage. Dragapult's -2 Atk and -3 SpA weaken its attacks, so Garchomp can take a hit and threaten a knockout.

   Reasoning trace (85 words)

   With Gholdengo down, I need to pick a switch-in—Garchomp is at full health but Mega isn't available here, while Incineroar is at 60%. I'm also weighing Dragapult's stat drops and checking whether its Phantom Force would even be effective against Garchomp given the Ghost-vs-Dragon/Ground typing.
   
   Garchomp looks like the stronger pick here: it resists or takes neutral damage from Dragapult's weakened attacks, hits back hard with Outrage, and sits at full HP against a Dragapult that's already taken some damage. I'll switch to Garchomp.
   
   

5. Turn 4
   Mercury Decide switched to Garchomp1,814 tok · 0.6 s · $0.0000

   63% SWITCH: garchomp, 14% SWITCH: metagross, 10% MOVE: dracometeor

   Claude Haiku 5.5 used Outrage3,822 tok · 7.9 s · $0.0009

   Dragapult is Dragon/Ghost, so Outrage is 2x super effective and STAB. Garchomp's 182 Attack should KO its roughly 130-156 remaining HP even against high defensive investment. Skipping Mega avoids losing Speed.

   Reasoning trace (120 words)

   Dragapult's at roughly 130-156 HP remaining with 80% left. I'm checking the type matchup for Garchomp's Outrage against Dragapult's Dragon/Ghost typing, since Dragon moves hit Dragon types for double damage.
   
   I'm weighing whether to mega evolve Garchomp — Mega Garchomp trades some Speed for a big Attack boost, which raises damage output but risks letting Dragapult outspeed and strike first, so regular Outrage without mega might actually be the safer, still-strong option given the STAB and type advantage.
   
   Rough Skin only triggers on contact hits against Garchomp, so Phantom Force going first isn't a big concern, and Garchomp should survive regardless. I'll skip the mega evolution since it costs speed, and just go with non-mega Outrage for the KO.
   
   

   Mercury Decide switched to Metagross1,466 tok · 0.5 s · $0.0000

   88% SWITCH: metagross, 12% SWITCH: dragapult

6. Turn 5
   Mercury Decide used Meteormashmega1,937 tok · 0.6 s · $0.0000

   57% MOVE: meteormash [MEGA], 10% MOVE: meteormash, 10% MOVE: bulletpunch [MEGA]

   Claude Haiku 5.5 used Outrage2,280 tok · 1.9 s · $0.0003

   Garchomp is the only legal option here, and Mega Evolution is unavailable. Outrage is the only move offered, and Garchomp outspeeds Metagross, so it moves first.

   Reasoning trace (20 words)

   Outrage is the only legal move available here, since Mega isn't an option, so I'll just go with it.
   
   

7. Turn 6
   Mercury Decide used Meteormash1,724 tok · 0.5 s · $0.0000

   95% MOVE: meteormash, 2% MOVE: bulletpunch, 2% MOVE: zenheadbutt

   Claude Haiku 5.5 used Earthquakemega5,173 tok · 15.0 s · $0.0015

   Garchomp at 41 HP is outsped by Metagross only if Metagross has high Speed, so the key is landing a knockout first. Earthquake is super effective on Steel, and Mega Garchomp's Attack boost makes a KO on the 61% Metagross very likely. Confusion risk remains, but this is the strongest line.

   Reasoning trace (254 words)

   My Garchomp got confused from Outrage and is at 41/185, so there's a 33% self-hit risk. Mega Metagross is Steel/Psychic and sitting at 61%, meaning Earthquake would hit it super effectively, but I need to check the speed matchup since Mega Garchomp's speed boost is uncertain against it.
   
   I'm weighing Earthquake's likely damage against Metagross's bulk versus the risk that Meteor Mash could knock out my low-HP Garchomp first, with rough skin chipping away at Metagross if it makes contact. Mega evolving shouldn't be blocked by confusion, so the real decision is whether the damage math favors trading hits now.
   
   Even with a 33% confusion self-hit risk, the damage from that is likely survivable since it's only moderate against Mega Garchomp's decent Def. Going with Earthquake while mega-evolved makes sense since Metagross is weak to it and should take heavy damage.
   
   Let me redo the damage math more carefully using the standard formula, factoring in Metagross's defense range, to see if non-mega earthquake reliably knocks it out or leaves it standing.
   
   But mega-evolving drops speed, so Metagross might actually outspeed and hit first with Meteor Mash, which could be lethal given our Def 115. Confusion's 33% self-hit risk applies to both of us regardless of choice, so I'm weighing whether staying non-mega to keep speed priority is safer than mega's harder-hitting but slower Earthquake.
   
   I'll go with mega Earthquake for the more reliable knockout, accepting the risk that Metagross might outspeed and strike first since we're already low at 41 HP either way.
   
   

   Claude Haiku 5.5 switched to Incineroar2,224 tok · 1.3 s · $0.0003

   Garchomp fainted, so the only legal action is switching to Incineroar. Incineroar is the sole remaining option, and it can use Intimidate on Metagross's entry.

8. Turn 7
   Mercury Decide used Meteormash1,764 tok · 0.5 s · $0.0000

   51% MOVE: meteormash, 35% SWITCH: dragapult, 11% MOVE: stealthrock

   Claude Haiku 5.5 used Flareblitz3,158 tok · 6.2 s · $0.0007

   Metagross Mega is faster than Incineroar and has Tough Claws Meteor Mash, but Incineroar at 122 HP should survive one hit. Flare Blitz is super effective against Steel and should knock out the 61% Metagross. Fake Out is illegal since Incineroar is not on its first turn.

   Reasoning trace (76 words)

   Incineroar's at 122/202 HP, while Mega Metagross sits at 61%. Since Metagross is Steel/Psychic, Flare Blitz should hit it hard with the Fire-type advantage, likely dealing massive damage given Incineroar's attack stat against Metagross's defense.
   
   Metagross outspeeds though, so I need to check whether its Meteor Mash (even lowered by -1 attack from the miss-boosting mechanic) could threaten to take down Incineroar first, since the damage against Incineroar's defense would be neutral but still substantial.
   
   

   Mercury Decide switched to Dragapult

   100% SWITCH: dragapult

9. Turn 8
   Mercury Decide used Dracometeor1,542 tok · 0.5 s · $0.0000

   97% MOVE: dracometeor, 2% MOVE: uturn, 1% MOVE: shadowball

   Claude Haiku 5.5 used Protect3,078 tok · 5.1 s · $0.0006

   Dragapult outspeeds Incineroar (145+ vs 80) and its Life Orb Dracometeor or Phantom Force could likely finish off the 91 HP Incineroar before Parting Shot or Flare Blitz resolves. Flare Blitz is also not very effective against a Dragon type. Protect blocks this turn's hit and keeps Incineroar alive for a later Parting Shot.

   Reasoning trace (66 words)

   I'm checking whether Dragapult's Draco Meteor with Life Orb could knock out Incineroar at 91/202 HP, noting Flare Blitz is resisted since Dragapult is Ghost/Dragon and it outspeeds Incineroar anyway.
   
   Since Dragapult likely moves first and could KO Incineroar before I act, Parting Shot risks being wasted, so Protect looks like the safer choice to survive the turn and avoid the Draco Meteor hit entirely.
   
   

10. Turn 9
    Mercury Decide used Dracometeor1,452 tok · 0.5 s · $0.0000

    95% MOVE: dracometeor, 4% MOVE: phantomforce, 2% MOVE: uturn

    Claude Haiku 5.5 used Flareblitz3,697 tok · 9.3 s · $0.0010

    Dragapult is faster and will likely KO Incineroar with Draco Meteor next turn, and Incineroar is our last Pokémon, so there is no switch to preserve it. Protect only delays the inevitable and has a failure chance after last turn's use. Flare Blitz is resisted but deals roughly 35-40% and gives a burn chance, which is the most damage available.

    Reasoning trace (188 words)

    With Incineroar at 91/202 HP against mega Dragapult, Flare Blitz isn't very effective since Fire is resisted by Dragon and neutral against Ghost, so it likely only does around 30% and won't KO, plus the recoil is risky given Dragapult outspeeds.
    
    Draco Meteor from mega Dragapult would likely knock out Incineroar given its special bulk isn't enough to tank 130 BP. Protect seems safest to block this turn's attack, though I used it last turn so there's a chance it fails if used consecutively; Parting Shot could lower Dragapult's stats, but I need to check if Incineroar is actually my last Pokémon left since no switches are showing as legal options, which would make Parting Shot risky or useless.
    
    Flare Blitz is the alternative — against a non-STAB target at 0.5x effectiveness, I'm estimating roughly 37-40% damage to Dragapult's current HP, which wouldn't KO it, plus I'd take recoil damage myself. Since Incineroar likely dies to Draco Meteor next turn regardless of what I do now, dealing chip damage with Flare Blitz might be more valuable than Protect, which just delays the inevitable without accomplishing anything offensively.