I've always wondered this..... since they don't have
chakra?
What?...................I've always wondered this..... since they don't have
chakra?
Everyone within Narutoverse has chakra dumbass, they would be dead if they didn't. Also Guy can use Ninjutsu now, he just couldn't when he was younger. Also there's nothing wrong with Lee's body, neither there was with Guy's that would have prevented them use of Ninjutsu, just lack of talent.