Generation Iv
Iron Fist
Boosts the power of punching moves.
Detailed Effect
Moves flagged as being punch-based have 1.2× their base power for this Pokémon. Sucker Punch is not flagged as punch-based; its original, Japanese name only means "surprise attack".
Pokémon With Iron Fist
20 canonical Pokémon forms can have this Ability.

Hitmonchan 
Golett 
Golurk
Pancham
Pangoro
Crabrawler
Crabominable
Melmetal
Melmetal Gmax
Mega Crabominable
Ledian
Chimchar
Monferno
Infernape
Timburr
Gurdurr
Conkeldurr
Pawmi 
Pawmo
Pawmot