Alright a really quick suggestion which will hopefully make both Pirate101 and Wizard101 standout. (Another crossover event.) I highly suggest making Old Scratch skeletal shaman a skeleton key boss in wizard101. It would be interesting to see what gear he drops. Along with the cheats he does in combat.
Old Scratch: Only uses shadow magic spells. So for example if you were to blade yourself he would use the doom mojo spell on everyone. With that being done it would then give everyone a shadow pip fizzle spell like quench. Basically preventing the use of shadow spells. [Class: Shadow Magic.]
Bones McCoy: He spawns in any minion from any world doesn't matter about level it could go from Level 1-130 in the four slot in the combat table. And every time your wizard101 kills the the enemy in the four slot. Bones would proceed to summon a new minion. (However it can't be a boss) [Class: Storm]
Mr Neville: Every second turn Mr Neville will either cast a heal spell, a full team feint, or a bladestorm spell. [Class: Life]