To unlock the following characters, commit to the corresponding criteria:

Geary: Beat Geary at Teknee.
Krunk: Beat Krunk at Terra.
N. Tropy: Beat the game with all Team Cortex characters.
Nash: Beat Nash at Barin.
Norm: Beat Norm at Fenomena.
Spyro: Beat the game with all Team Bandicoot characters.
Velo: Beat the game.