Suggested by Destroyer Gon is a pretty strong kid but I don’t think he can hope to take on someone as fast as Tsuna. Tsuna has been getting consistently stronger over the various arcs of Reborn and he actually made it to Goku level by the end. Gon may have his adult form but I don’t think it will be enough here. Tsuna’s X Burner will steal the win. Tsuna wins.