Pokemon Fushigi no Dungeon: Honoo no Tankentai

The manga is based on the Pokémon Mystery Dungeon: Explorers of Time and Explorers of Darkness games.

The story revolves around Honō, an amnesiac human who wakes up as a Chimchar. He meets a cowardly Totodile, and together, they form Team Blaze.

(Source: Bulbapedia)