How do you get unlimited bolts in ratchet and clank a crack in time?

you cant. but you can get them faster! go to the agorian battleplex and go to silver cup and select fun with turrets. when the challenge starts do not use the turret, instead jump to where the agorians are and attcak them with everything you got! you might need to use mr. zurkon for support. try to stay alive as long as you can have fun! :)