Bounce Man is something in between and the ideal form that Luffy uses when he goes into Gear 4. While all these powers are certainly impressive, Luffy's greatest power and One Piece is ...

The latest episode of One Piece saw Luffy trying to match up his Gear Fourth abilities against Kizaru, and it was clear that this wasn’t enough to bridge the gap in power between the two of them.

Basic physical strikes from even powerful characters like Kisame or Kakuzu would likely bounce off ... probably surpass Luffy's defenses even after Madara activates Gear Fourth or Fifth.