Mud-Slap

Mud-Slap is a Ground-type move introduced in Generation 2.

Values by generation

From PokeAPI's change history. Up to Generation 3, physical or special depends on the type. Highlighted cells changed from the previous generation.

Generation	Type	Category	Power	Accuracy	PP	Priority
Generation 2	Ground	Physical	20	100	10	+0
Generation 3	Ground	Physical	20	100	10	+0
Generation 4	Ground	Special	20	100	10	+0
Generation 5	Ground	Special	20	100	10	+0
Generation 6	Ground	Special	20	100	10	+0
Generation 7	Ground	Special	20	100	10	+0
Generation 8	Ground	Special	20	100	10	+0
Generation 9	Ground	Special	20	100	10	+0

Gold / Silver · Crystal	Reduces the foe's accuracy.
Ruby / Sapphire · Emerald	Hurls mud in the foe’s face to reduce its accuracy.
FireRed / LeafGreen	Mud is hurled in the foe’s face to inflict damage and lower its accuracy.
Diamond / Pearl · Platinum · HeartGold / SoulSilver	The user hurls mud in the foe’s face to inflict damage and lower its accuracy.
Black / White · Black 2 / White 2 · X / Y · Omega Ruby / Alpha Sapphire · Sun / Moon · Ultra Sun / Ultra Moon · Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / Shield	The user hurls mud in the target’s face to inflict damage and lower its accuracy.
Legends: Arceus	The user hurls mud in the target's face to inflict damage. Incoming moves also become more likely to miss.
Scarlet / Violet	The user hurls mud in the target's face to inflict damage and lower its accuracy.

Gold / Silver · Crystal	TM31
Scarlet / Violet	TM05

All versions combined; see each Pokémon's page for game-by-game details.

Sources : PokeAPI (moves, move_changelog, move_flavor_text, pokemon_moves, machines)