Isn't he one of only two digimon to come from Babydmon? Would it not be easier to go with his natural In-Training form?
Edit: What would you guys think about me making a Piccolomon of sorts in the form of a human with a Zubamon partner? Someone who protects the Chosen Children and also trains them once they begin gaining their crests? Helps them face their shortcomings, like how Suzume has always had her brothers looking out for her but needs to learn how to stand alone.