The build
Item
Choice Scarf
Ability
Beads of Ruin
Tera type
Fire
Nature · EVs
Timid · 4 HP / 252 SpA / 252 Spe
Moves
Showdown export
Chi Yu @ Choice Scarf Ability: Beads of Ruin Tera Type: Fire EVs: 4 HP / 252 SpA / 252 Spe Timid Nature - Overheat - Dark Pulse - Psychic - Memento
Overview
Chi-Yu is banned from OU but dominates Ubers. Beads of Ruin lowers all opposing SpDef by 25%, making Chi-Yu's Specs/Scarf Overheat a near-guaranteed 2HKO on neutral targets. At base 100 Speed, Scarf gives it 459 Spe (level 100) — outspeeds most unboosted Pokémon. Memento provides emergency Atk/SpA debuff on switch out.
Move analysis
Overheat is the nuke (130 BP, drops SpA after, but Scarf locks in next move). Dark Pulse for Ghost/Psychic types. Psychic for opposing Fire-types. Memento as a free turn to switch in a setup sweeper.
Team partners
Calyrex-Shadow (uses Beads of Ruin to KO walls), Zacian-Crowned (Tera Steel partner), Eternatus (status-soaker).
What beats Chi Yu
Heatran (Flash Fire), Iron Hands Drain Punch, Tera Ground bulky walls, Calm Mind Necrozma walls.
How to use the build
Open our damage calculator and plug in the EV spread above to see what Chi Yu OHKOs and 2HKOs against the current OU/VGC meta. Drop Chi Yu into the team builder to check defensive coverage gaps when paired with your other 5 slots.
Other Dark/Fire options
If you want to run a different Dark-type, browse our competitive builds hub. For more on Tera mechanics, see the damage calculator's Tera explainer and our guide on type matchups.