How do you get past last level in ratchet and clank?

basically play through the game on offline mode. Collect as many creatures as possible because i think that unlocks the secret labs that were aparently made by the character nerro? their are six labs to my knowledge and you enter into these labs from a platform and you have to guide this animal along through this maze. The first one i found was on the third level when you enter the plains. If you're lucky and you've collected enough creatures and played the game enough this will appear. i think you only need 12 for the first one. ive personally seen last resort and it's a giant robotic suit that shoots lasers or something but the guy was a level 10 and obviously experienced. Good luck