Suggested by iKnowledge Cottonmouth has returned to take on Robin. Cottonmouth appeared in Disk Wars which could amp up his speed and power, but I haven’t found any evidence to this being the case so for now I’d definitely take Robin to win. Robin would be able to overwhelm him in close quarters combat so Cotton’s famous mouth won’t be all that useful. A good bite is pointless if it’s not able to connect after all and it’ll be hard to tag Robin. Robin has too many gadgets at his disposal as well. Robin wins.