Psywave (move)

Psywave (Japanese: サイコウェーブ Psychowave) is a damage-dealing move introduced in Generation I. It was TM46 in Generation I. It was the signature move of in Generation II.

Generation I
Psywave inflicts a random amount of damage, varying between 1 damage and 1.5× the user's level.

In a link battle, the damage dealt varies between 1 damage and 1.5× the user's level on the user's side, and between 0 damage and 1.5× the user's level on its opponent's side in a link battle. As a result, if a 0 is generated in a link battle, it causes the games to desynchronize as the target will receive 0 damage on the opponent's game, while the user's side will keep generating pseudorandom numbers until it produces a number between 1 and 1.5× the user's level. Additionally, the game will freeze if a Level 0, 1, or 171 Pokémon uses the move, though Pokémon cannot normally be obtained at these levels without the use of glitches.

Generation II
Psywave inflicts a random amount of damage, varying between 1 and 1.5× the user's level. The damage is always rounded down; however, Psywave will always deal at least 1 HP of damage.

Psywave does not take weaknesses or resistances into account; however, type immunity is not ignored.

Generations III to IV
Psywave inflicts damage equal to (user's level) * (r * 10 + 50) / 100, where r is a random number from 0 to 10. The damage is always rounded down; however, Psywave will always deal at least 1 HP of damage.

Psywave can be used as part of a Pokémon Contest combination, with the user gaining extra two appeal points if was used in the prior turn.

Generation V
Psywave inflicts damage equal to (user's level) * (r + 50) / 100, where r is a random number from 0 to 100. The damage is always rounded down; however, Psywave will always deal at least 1 HP of damage.

Generation VI
Psywave's accuracy is changed from 80% to 100%.

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In other languages
Psywelle Psicoonda Vague Psy Psiconda サイコウェーブ 精神波（招式）