Poison · Special move · Gen 8
Shell Side Arm
Shell Side Arm is a Poison-type special move introduced in Generation 8. It has 90 base power and 100% accuracy, with 10 PP (16 with PP Max). 1 Pokémon and forms can learn it.
Type
Poison
Category
Special
Power
90
Accuracy
100%
PP
10 (max 16)
Priority
0
Effect
20% psn. Physical+contact if it would be stronger. Has a 20% chance to poison the target. This move becomes a physical attack that makes contact if the value of ((((2 × the user's level / 5 + 2) × 90 × X) / Y) / 50), where X is the user's Attack stat and Y is the target's Defense stat, is greater than the same value where X is the user's Special Attack stat and Y is the target's Special Defense stat. No stat modifiers other than stat stage changes are considered for this purpose. If the two values are equal, this move chooses a damage category at random.
- Targets
- One adjacent Pokémon
- Scarlet & Violet
- Usable (1 Pokémon)
- Pokémon Champions
- Usable (1 Pokémon)
- Legends: Z-A
- Not usable
Type matchups as a Poison attack
2× vsGrassFairy
½× vsPoisonGroundRockGhost
0× vsSteel
Pokémon that learn Shell Side Arm
1 Pokémon and forms (Mega Evolutions share their base form's moves). ✓ = can learn it in that game by any method; “Gens” lists every main-series generation it could be learned in.
| Pokémon | Type | Champions | S/V | Z-A | Gens |
|---|---|---|---|---|---|
 Galarian Slowbro | Poison/Psychic | ✓ | ✓ | 8–9 |
Shell Side Arm FAQ
What does Shell Side Arm do?
Shell Side Arm is a Poison-type special move with 90 power. Has a 20% chance to poison the target. This move becomes a physical attack that makes contact if the value of ((((2 × the user's level / 5 + 2) × 90 × X) / Y) / 50), where X is the user's Attack stat and Y is the target's Defense stat, is greater than the same value where X is the user's Special Attack stat and Y is the target's Special Defense stat. No stat modifiers other than stat stage changes are considered for this purpose. If the two values are equal, this move chooses a damage category at random.
Which Pokémon can learn Shell Side Arm?
1 Pokémon and forms can learn Shell Side Arm in at least one game: 1 in Scarlet & Violet, 1 in Pokémon Champions and 0 in Legends: Z-A. Examples: Galarian Slowbro.
Is Shell Side Arm in Pokémon Champions?
Yes — 1 Pokémon can use Shell Side Arm in Pokémon Champions, with the same numbers as in Scarlet & Violet.
What is Shell Side Arm super effective against?
As a Poison-type attack, Shell Side Arm is super effective against Grass and Fairy, not very effective against Poison, Ground, Rock and Ghost and has no effect on Steel (unless its effect says otherwise).
Move data and effect text from Pokémon Showdown (MIT), generation from PokéAPI; learnsets for Gen 1–9, Pokémon Champions and Legends: Z-A from Showdown. Unofficial fan site.