Notes from author
Donatello is a difficult build as no weapon in game seems to match him perfectly. Scythe matches \\"stick\\" techniques most that I've seen. Darkmoon Blade and/or Rotten Pine Resin used to give purple appearance to weapon, for turtle distinction. Two-handing Scythe with Leather Shield in left hand give shell appearance.
This build can be adjusted to give higher health if needed in multiple ways. Ring of Steel can be swapped for either Seance Ring. Dex points can be sacrificed for more health, the weapon and buff are plenty strong with less.
Armor of Glorious might also be swapped with Chesters Coat or Witch Robe, I didn't think the length of either matched though, and the armor still has some purple.
Changing skin color when starting as Jubilant Catarina allows for green complexion. Just a tip; if Scythe is desired weapon try unlocking and leading targets with attacks. Difficult build... I apologize for lengthy notes