They were always able to fight the Puddy Patrol bare handed, and they weren't juiced up, but would morph for whatever that weeks villain was. So I can only assume they're powered up without it, but when they Morph they must be way way stronger than what was on the show. Unless, the power bleeding into they're normal selves is just to get them to return to the command center and it gets nerfed after they morph, which may indeed be the case.