Unlock Hidden Vivosaurs
Frigi - Defeat the 3 main BB bandits after you beat the game.
Igno - Beat Saurhead a certain amount of times after you beat the game.
The 3 Guh Robots - Use the time machine and defeat the 3 bots another time.
Dynal, Duna and Raptin - After you get the time machine, defeat him in his starship.
Squik and his other elements - Get all vivosaurs to rank 12.