When you fuze yours's and your partner's Hp's, Pl's, and Ki's are added together and you can use both characters attacks. To fuze with someone you both have to request it, know Fuzion Dance, be the same race (Nameks can fuze with mutants) and both must be the same PL. If someone has the right Potara earing and someone has the left, you can fuze nomatter what race or Pl. If one of the two wants to unfuse you both have to. You can't fuze more than once at a time.