TM21 (item)

Effects

TM21 teaches a move to a compatible Pokémon. TM21 is:

Game locations

Red​/​Blue
Celadon City (Gym - defeat Erika)
Gold​/​Silver
Goldenrod City (Department Store 5F on Sunday, show woman unhappy Pokémon)
Ruby​/​Sapphire
Pacifidlog Town (south; received if Pokémon's friendship low)
FireRed​/​LeafGreen
Rocket Hideout (B3F, south)
Diamond​/​Pearl
Veilstone City (Game Corner - 8,000 Coins)
HeartGold​/​SoulSilver
Goldenrod City (Department Store - show lady unhappy Pokémon)
Celadon City (Department Store - $1,000)
Black​/​White
Nimbasa City (PokeCenter - $10,000)
Black 2​/​White 2
Floccesy Ranch (after finding Herdier)
X​/​Y
O.Ruby​/​A.Sapphire
Sun​/​Moon
Malie City (Malasada Shop)
Ultra Sun​/​Ultra Moon
Malie City (Malasada Shop, from Oranguru)
L.G. Pikachu​/​L.G. Eevee
Pokémon Mansion (3F, north east)

Game descriptions

Ruby​/​Sapphire
Emerald
The less the user likes you, the more powerful this move.
FireRed​/​LeafGreen This attack move grows more powerful the less the user likes its TRAINER.
Diamond​/​Pearl
Platinum
HeartGold​/​SoulSilver
A full-power attack that grows more powerful the less the user likes its Trainer.
Black​/​White
Black 2​/​White 2
A full-power attack that grows more powerful the less the user likes its Trainer.
X​/​Y
O.Ruby​/​A.Sapphire
A full-power attack that grows more powerful the less the user likes its Trainer.
Sun​/​Moon
Ultra Sun​/​Ultra Moon
This full-power attack grows more powerful the less the user likes its Trainer.