Specializes EVs in Sp. Atk and Speed, Focus SashHoundoom build that compensates for low physical bulk via this item to act reliably. Intentionally chooses a Defense-lowering Nature to increase incoming damage, Forcibly defeats opponents with powerful Counter and special moves — its composition.

Role of the Focus Sash Attacker build

Focus Sash uses as a shield to survive opposing attacks in the matchup, and Counter handles physical attackers, and pressures opponents with special moves as its role. Even when about to be defeated, Uses Destiny Bond to force a 1-for-1 trade and support backup — core gameplay.

Sp.Atk/Spe EVs; Flame Charge raises Speed and broad special moves attack — Mega Houndoom build. Team weather sets sun, ability-boosted power and 1-turn Grass moves are leveraged — viable.

Alternative Move Options

Overheat → Fire Blast viable

Overheat drops own Sp.Atk 2 stages — swap to Fire Blast if concerned. However, Fire Blast has 85 accuracy vs. Overheat's 90, accuracy drops — be careful.

Sun Sweeper Ace Role

From base 115 Speed, fire/dark moves pressure and KO opponents. In sun, Water-coverage is secured, boosted special power breaks walls and dominates as ace.

Threats

Weak to faster weakness-types

Mega Houndoom's bulk isn't high, so being outsped risks OHKO. Watch for type-disadvantage or Scarf users.