In the game, you choose your starter Pokémon from a selection of three:
* Chimchar (Fire)
* Turtwig (Grass)
* Piplup (Water)
The game doesn't allow you to choose other Pokémon, including Totodile, as your starting partner.
However, there are ways to encounter and interact with Totodile in the game:
* Recruiting: You can encounter Totodile during your adventures and potentially recruit it to your team, just like any other Pokémon.
* Trading: You can trade Pokémon with other players online or via local wireless connection, which might allow you to obtain a Totodile.
* Special Events: There may be limited-time events or downloadable content that introduces new Pokémon, including Totodile.
To play as Totodile, you'd have to look to other Pokémon Mystery Dungeon games or fan-made content.