From Bulbapedia, the community-driven Pokémon encyclopedia.

Shell Side Arm (Japanese: シェルアームズ Shell Arms) is a damage-dealing Poison-type move introduced in Generation VIII. It is the signature move of Galarian Slowbro.

Effect

Shell Side Arm deals damage and has a 20% chance of poisoning the target.

Shell Side Arm forecasts whether its base damage would be higher as a physical move or special move, and becomes the category that it predicts would inflict more damage (chosen randomly if they are tied). For the forecast only, stat modifiers other than stat stages are ignored, and Wonder Room is applied to stat stage modifiers but not to the original stats.

Shell Side Arm has a different animation depending on whether it is a physical or a special move. If it is a physical move, it makes contact; if it is a special move, it does not.

Generation VIII

Pokémon Brilliant Diamond and Shining Pearl

Shell Side Arm cannot be selected in a battle.

Description

Games Description
SwShLA This move inflicts physical or special damage, whichever will be more effective. This may also poison the target.
BDSP This move can't be used. It's recommended that this move is forgotten. Once forgotten, this move can't be remembered.
SV This move is either physical or special—whichever will inflict more damage. This may also poison the target.

Learnset

By leveling up

# Pokémon Types Egg Groups Level
VIII IX
0080 Slowbro PoisonIC Big.png
PsychicIC Big.png 		Monster Water 1 1, Evo. Evo.
Bold indicates a Pokémon gains STAB from this move.
Italics indicates a Pokémon whose evolution or alternate form receives STAB from this move.
A dash (−) indicates a Pokémon cannot learn the move by the designated method.
An empty cell indicates a Pokémon that is unavailable in that game/generation.

In the anime

Appearance

As a special move

As a physical move

In other languages