Get these skins by obtaining a certain number of titanium bolts or by doin various tasks. Note: Only works in single player mode.

Skin	How to Unlock
Brainius ( B2 Brawlers cousin)	costs 6 titanium Bolts
Bugnoid ( insect alien )	costs 6 Titanium Bolts
Old School Ratchet (original uniform)	Ratchet and clank 1 save file.
Robo ( Robo Break Dancer!!)	Costs 5 Titanium Bolts
Robo Rooster ( Bug eyed Robot)	Costs 6 Titanium Bolts
Snowman Skin	costs 6 titanium bolts
Trooper ( Robotic enemy)	Costs 5 Titanium Bolts
Tuxido Ratchet	costs 6 Titanium Bolts