How many unique opponents are there in Mike Tyson's Punch-Out!!?
11
Q2705496
entity
Punch-Out!!
Mike Tyson's Punch-Out!!
Q5567057
Glass Joe
Q7642554
Super Macho Man
Q79031
Mike Tyson
Q7941464
Von Kaiser
Q6411715
King Hippo
Q5600087
Great Tiger
Q4850286
Bald Bull
Q16227269
Soda Popinski
Q7198513
Piston Hondo