Yep, Luffy definitely has an unknown G4th form as well, perhaps his strongest G4th form whose timelimit will be significantly shorter than his other G4th forms.
Also, Luffy has to do something against his timelimit. He can't obviously fight a monster like Kaido for 30 mins. That's too short.
Also, Luffy has to do something against his timelimit. He can't obviously fight a monster like Kaido for 30 mins. That's too short.