With the release of Sun and Moon, there was the battle tree. Many returning characters from previous games are able to be battled in the battle tree and have very diverse teams. What would you think would happen if previous gym leaders from other generations returned to Alola for the battle tree. What would they look like? Which pokemon would they use? What else would they do in Alola (i.e Grimsley being sketchy on the beach and Colress giving Genesect Drives)