How do you start as a totodile in Pokemon Blue rescue?

In Pokémon Blue Rescue Team, you cannot start as a Totodile since it is not one of the starter Pokémon available in that game. At the beginning, you can choose from three starters: Bulbasaur, Charmander, or Squirtle. To play as a Totodile, you would need to recruit it later in the game by finding and befriending it in the wild or through specific missions.