|Debut:||Island of the Giant Pokémon!|
|Evolved:||Less than 1 episode as a Slowpoke|
|Evolves In:||Island of the Giant Pokémon!|
When Ash's Pokemon encounter Slowbro, it is a Slowpoke that just ignores their questions. It then dips its tail into the water before they move on. When it is last seen, it is still with its tail in the water, but when it removes it from the water, a Shellder has latched onto it and it had evolved into Slowbro.
None of Slowbro's moves are known.