How about Snapdramon?
The Snap part evokes the image of a crocodile. The Dra part is very much Digimon, but also one of the Latin words for Crocodile is Cocodrilus. The Dri from that can contribute to the Dra(i) part of the name. Also, the whole name calls to mind Snapdragon, a way-too-cool name for a kind of flower. You can give the mon a plant theme with thorns or Pokémon-style vine whip appendages that sort of just appear out of nowhere. It could even work as an evolution for Petaldramon with this theme.