In the first generation Pokemon games for Gameboy, a Squirtle may be chosen as the player's first Pokemon. It will eventually evolve into a Wartortle and a Blastoise, and if one is sure that it will indeed be a BAMF when it evolves into a Blastoise, one can be presumptive and nickname Squirtle "Bamftoise" right off the bat. Nothing will physically change about the Pokemon, but all the children will think it is the coolest name in town.
Apollo: Hey yo Walter! Come battle me. My Bamftoise will wreck you.