Info on the move Stomp

Stomp

Stomp deals damage and has a 30% chance of causing the target to flinch (if the target has not yet moved).

Pokémon with the ability Inner Focus or those behind a Substitute cannot be made to flinch.

If the target has used Minimize, Stomp ignores accuracy and deals double damage.

When a Pokémon is holding Normalium Z and uses its Z-Power, Stomp turns into Breakneck Blitz and has base power 120.

Gold Silver Crystal	An attack that may cause flinching.
Ruby Sapphire Emerald	Stomps the enemy with a big foot. May cause flinching.
FireRed LeafGreen	The foe is stomped with a big foot. It may make the foe flinch.
Diamond Pearl Platinum HeartGold SoulSilver	The foe is stomped with a big foot. It may also make the target flinch.
Black White Black 2 White 2	The target is stomped with a big foot. It may also make the target flinch.
X Y O.Ruby A.Sapphire	The target is stomped with a big foot. This may also make the target flinch.
Sun Moon Ultra Sun Ultra Moon L.G. Pikachu L.G. Eevee	The target is stomped with a big foot. This may also make the target flinch.
Sword Shield B.Diamond S.Pearl	The target is stomped with a big foot. This may also make the target flinch.