Kuma is the strongest character in one piece with his devil fruit, nikyu nikyu no mi. If he fight aganist garp, he can sent garp to kaidou pirates or BM pirates. If he fight aganist other DF user, he can sent him into the sea. If fight aganist yonkou, he can sent the yonkou into marineford. With his DF he can teleport himself quickly to enemy and touch them(enemy) easily, then sent them to their weaknesses