Matches · 2026-10-14 · rules version c5

Claude Haiku 5.5 vs Mercury Decide

Player 1 · winner

Claude Haiku 5.5

Claude Haiku 5.5's team

autopilot 0%

Player 2

Mercury Decide

Mercury Decide's team

autopilot 0%

Claude Haiku 5.5 won in 6 turns · 75 s wall clock · 63,503 tokens · $0.008

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Decisions

Team preview
Mercury Decide brought Dragapult,garchomp,metagross5,614 tok · 2.0 s · $0.0001
Lead: 55% BRING: dragapult, 16% BRING: metagross, 12% BRING: rotomwash Pick 2: 33% BRING: garchomp, 33% BRING: metagross, 18% BRING: scizor Pick 3: 46% BRING: metagross, 24% BRING: scizor, 17% BRING: rotomwash
Claude Haiku 5.5 brought Incineroar,garchomp,kingambit3,405 tok · 4.4 s · $0.0007
Opponent team: Garchomp, Scizor, Metagross, Rotom-Wash, Dragapult (fast), Toxapex (wall). I lead Incineroar for Fake Out and Intimidate, with Garchomp as the mega sweeper and Kingambit as a Dark/Steel check on Scizor and Dragapult. Watch for Toxapex walling and Dragapult's speed; Parting Shot can cycle Garchomp in safely.
Reasoning trace (44 words)
```
Looking at the opponent's team with Garchomp, Scizor, Metagross, Rotom-Wash, Dragapult, and Toxapex, I'm weighing which three of my six to bring. Incineroar stands out for intimidate, fake out, and parting shot utility against this lineup, alongside Garchomp and Kingambit as strong picks.
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Turn 1
Mercury Decide used Dragonpulse1,919 tok · 0.6 s · $0.0000
95% MOVE: dragonpulse, 2% SWITCH: garchomp, 2% SWITCH: metagross
Claude Haiku 5.5 used Partingshot4,220 tok · 6.5 s · $0.0009
Opponent: Dragapult (Dragon/Ghost, fast, likely Infiltrator or Clear Body, one -1 Atk from Intimidate). Fake Out cannot hit it and Flare Blitz is resisted. Plan: Parting Shot to bring in Kingambit, which hits Dragapult super effectively with Kowtow Cleave or Sucker Punch. Save Garchomp as the mega sweeper for later. Watch for Scizor, Metagross, and Toxapex, plus Rotom-Wash's Electric/Water typing.
Reasoning trace (88 words)
```
I'm noting Fake Out fails against Dragapult since Ghost types are immune to Normal moves, and Flareblitz is resisted by its Dragon typing, while its Ghost side is actually weak to Dark-type moves like Parting Shot.

Switching through Parting Shot could bring in Kingambit, and I'm working through the type matchups—whether Dark/Steel resists Dragapult's Dragon and Ghost attacks. I conclude Kingambit's Sucker Punch and Kowtow Cleave hit back super effectively since Ghost is weak to Dark, even though speed could be an issue against the already-weakened Dragapult.
```
Claude Haiku 5.5 switched to Kingambit3,809 tok · 10.6 s · $0.0005
Turn 1: Parting Shot cycled Incineroar out. Dragapult (Life Orb, Dragon Pulse, possibly Infiltrator/Clear Body/Cursed Body) is at -2 Atk and -1 SpA. Kingambit switches in: Steel resists Dragon Pulse, and Kowtow Cleave / Sucker Punch hit Dragapult super effectively. Dragapult outspeeds everything, so Kingambit should take a hit and punish. Keep Garchomp in reserve as the mega sweeper. Watch for Scizor, Metagross, Toxapex, and Rotom-Wash.
Reasoning trace (31 words)
```
Switching to Kingambit makes sense here since Dragapult is already weakened with its attack drops, and Kingambit's Dark-type Kowtow Cleave hits Dragon/Ghost super effectively while Sucker Punch stays reliable too.
```
Turn 2
Mercury Decide switched to Metagross2,246 tok · 0.6 s · $0.0000
39% SWITCH: metagross, 31% SWITCH: garchomp, 24% MOVE: uturn
Claude Haiku 5.5 used Kowtowcleave4,034 tok · 3.9 s · $0.0005
Kingambit is in against Dragapult (Life Orb, -2 Atk, -1 SpA), which outspeeds it. Kowtow Cleave is the safer hit: it doesn't check accuracy, and Dark is super effective on Ghost. Sucker Punch could fail if Dragapult switches or uses a non-attack. Steel resists Dragon Pulse, so Kingambit can take a hit. Garchomp is saved as the mega sweeper, and Incineroar can come back later for Fake Out and Intimidate. Watch for Scizor, Metagross, Toxapex and Rotom-Wash.
Reasoning trace (77 words)
```
I'm working out Kingambit's Kowtow Cleave damage against Dragapult at -2 Attack, factoring in the Dark-type super effectiveness against Ghost, Black Glasses boost, and checking whether Supreme Overlord adds anything given no fainted allies.

Sucker Punch feels riskier since it fails if Dragapult isn't attacking, and I'm not certain of its move choice this turn, whereas Kowtow Cleave reliably lands and should put Dragapult around 90% damage or secure a near-KO, so I'll go with kowtowcleave.
```
Mercury Decide switched to Garchomp1,863 tok · 0.9 s · $0.0000
95% SWITCH: garchomp, 5% SWITCH: dragapult

Turn 3

Mercury Decide used Earthquakemega2,493 tok · 0.7 s · $0.0000

96% MOVE: earthquake [MEGA], 4% MOVE: earthquake, 0% MOVE: swordsdance [MEGA]

Claude Haiku 5.5 used Suckerpunch5,431 tok · 18.1 s · $0.0010

Opponent: Garchomp (unknown item, maybe Garchompite, Sand Veil or Rough Skin), Dragapult (Life Orb, -2 Atk, -1 SpA, outspeeds us), Metagross down. Scizor, Rotom-Wash, Toxapex remain. Kingambit (70 Spe) is slower than Garchomp, so Garchomp's Earthquake hits hard (Ground is 2x on Kingambit). Sucker Punch goes first and hits while Garchomp is attacking. If Kingambit survives, Kowtow Cleave next. Keep Garchomp for a mega sweep later. Incineroar (62.9%) can Parting Shot to cycle.

Reasoning trace (114 words)

I'm weighing whether Kowtow Cleave hits Garchomp hard enough, noting the speed disadvantage means Garchomp moves first and could be carrying a Garchompite to Mega Evolve.

Earthquake would be very dangerous against Kingambit's Steel typing, so I'm also considering whether swapping to my own Garchomp is safer, though the matchup against their Garchomp would be fairly neutral with similar speeds.

Since Garchomp is faster, Sucker Punch actually goes off as priority before it can attack, hitting for roughly 40-50% versus Kowtow Cleave's higher power but slower follow-up. Given Sucker Punch guarantees the pre-emptive hit as long as Garchomp attacks (which it likely will), that's the safer choice over Kowtow Cleave's riskier damage trade.

Claude Haiku 5.5 switched to Incineroar5,215 tok · 8.4 s · $0.0010

Kingambit fainted. Opponent has Mega Garchomp at 58% (Earthquake, Sand Force), Dragapult at 90% (Life Orb, Dragon Pulse), and Scizor, Rotom-Wash and Toxapex still unseen. Switching Incineroar back in gives Intimidate, which cuts the Mega Garchomp's Attack before it hits. Garchomp can come in later to Dragon Claw Garchomp for 2x damage and outspeed it.

Reasoning trace (120 words)

I'm assessing the field state: our full-health Garchomp against their weakened Mega Garchomp with Earthquake and their Dragapult at 90% holding Life Orb, weighing whether to keep Garchomp in or switch to Incineroar.

Checking speed and typing matchups, our Garchomp should outpace theirs, and since both are Dragon/Ground, their Earthquake lands as neutral damage rather than something we resist or are immune to.

Considering Incineroar instead: it's Fire/Dark, so Earthquake hits neutrally, and Flare Blitz back is also neutral against Garchomp. Still, bringing Garchomp in seems best since it outspeeds their mega Garchomp, can tank or avoid the Earthquake hit on the switch, and then clean up with a super-effective Dragon Claw next turn, though switching does cost tempo.

Turn 4

Mercury Decide used Earthquake2,255 tok · 0.9 s · $0.0000

98% MOVE: earthquake, 1% MOVE: swordsdance, 1% MOVE: stoneedge

Claude Haiku 5.5 used Partingshot5,759 tok · 10.0 s · $0.0011

Turn 4: Incineroar (127/202) is active. Opponent has Mega Garchomp at 58% (Sand Force, Earthquake, Atk -1) and Dragapult at 90% (Life Orb, Dragon Pulse, Atk -2/SpA -1 from my Parting Shot). Scizor, Rotom-Wash and Toxapex are unseen. Parting Shot pulls Incineroar out and lowers their Garchomp's Atk again. Next turn, bring in Garchomp, Mega it and Dragon Claw their Garchomp or Dragapult for 2x damage. Garchomp outspeeds their Garchomp.

Reasoning trace (203 words)

Incineroar's at 127/202, facing a Mega Garchomp at 58% with its attack dropped from intimidate, and a Dragapult at 90% holding Life Orb. I'm weighing switching to my own full-health Garchomp, which could mega evolve too, against staying in with Incineroar.

My Garchomp at 169 speed likely outspeeds their mega form regardless of its range, and their Earthquake wouldn't hit mine super effectively since Dragon/Ground isn't weak to Ground. My Dragon-type moves would hit both their Garchomp and Dragapult for super effective damage, making the switch look favorable.

Fire is weak against Dragon but neutral against Ground, so Incineroar staying in means taking a weak hit but still getting chipped by Earthquake. With Incineroar at 127 HP and their Garchomp at 58% with -1 Attack, I'm estimating Earthquake would still deal a solid 50-60% chunk even with the stat drop.

Better to switch to my own Garchomp, which outspeeds and sets up Dragon Claw once Mega Evolved next turn -- their Earthquake would only hit neutrally against my Garchomp's 185 HP, so that's manageable. Actually Parting Shot is even better than a plain switch since it also drops their Atk/SpA further before bringing Garchomp in safely, so I'll go with Parting Shot.

Claude Haiku 5.5 switched to Garchomp

Incident report

Only one legal action: played without asking.

Turn 5

Mercury Decide used Dragonclaw2,401 tok · 1.2 s · $0.0000

86% MOVE: dragonclaw, 5% MOVE: swordsdance, 5% SWITCH: dragapult

Claude Haiku 5.5 used Dragonclawmega5,576 tok · 8.1 s · $0.0009

Plan: Mega Garchomp now and Dragon Claw their Mega Garchomp (58%) for a super-effective hit. My Garchomp (169 Speed) outspeeds theirs. Dragapult (Life Orb, Dragon Pulse, Atk -2/SpA -1) is still unseen on Scizor, Rotom-Wash and Toxapex. Their Garchomp has Sand Force and Earthquake. Next, Stone Edge or Earthquake for coverage, and Swords Dance only if the field is safe.

Reasoning trace (117 words)

I'm checking the matchup: my full-health Garchomp against the opponent's Mega Garchomp at 58% with Sand Force and a lowered attack stat, trying to figure out whether its Earthquake actually hits my Dragon/Ground Garchomp super effectively or not—since Ground isn't effective against another Ground-type despite the Dragon typing.

I'm also estimating damage from my own Dragon Claw against their Mega Garchomp's defense, factoring in STAB and the 2x same-type bonus from the mirror matchup, to see if I can finish it off this turn.

Megaing swaps my ability to Sand Force, and Dragon Claw gets the 2x boost against Dragon/Ground anyway, so this should net a solid KO. I'll go with Mega evolve and Dragon Claw.

Mercury Decide switched to Dragapult

Incident report

Only one legal action: played without asking.

Turn 6
Mercury Decide used Dragonpulse2,344 tok · 0.7 s · $0.0000
97% MOVE: dragonpulse, 1% MOVE: phantomforce, 1% MOVE: shadowball
Claude Haiku 5.5 used Earthquake4,919 tok · 4.1 s · $0.0008
Turn 6: My Mega Garchomp (185/185) faces Dragapult at 90% (Life Orb, Dragon Pulse). Dragapult may have Clear Body, Infiltrator or Cursed Body. Dragapult's Speed (145-213) may beat my 158, so it could hit first. Earthquake is 2x on Dragapult and has the highest power among my STAB moves. Plan: Earthquake now, then keep attacking. Incineroar and Kingambit are down. Opponent still has Scizor, Rotom-Wash and Toxapex unseen. Avoid Scizor's Bug/Steel moves and Rotom-Wash's Electric/Water moves. Watch for Toxapex's Poison/Water hits.
Reasoning trace (70 words)
```
Checking the matchup: my Mega Garchomp is Dragon/Ground against their Dragapult (Dragon/Ghost). Dragon Claw would hit neutrally since Dragon is only super effective against Dragon when the target isn't also part Ghost, so I need to weigh other options.

Earthquake is actually the stronger pick here—it's STAB at 100 power versus Dragon Claw's 80, and ground-type coverage works fine since Dragapult has no Ground immunity. I'll go with Earthquake.
```