I just went with the first suggestions I got on twitter
Obviously Noella would be a demon with thermodynamics-related spells. One of them being a big energy sink in the form of a rabbit. As her bookkeeper, Cisco would have to deal with So Much.
In Ironius’ defense, how would he know
Because why not
Only a few are actually canon. Only one is endgame
Ironius as legendaries: Registeel, Cobalion, Magearna. Magearna is the best fit with the whole soul heart thing. Thank you Game Freak for validating Ironius lol!
Lol a crossover with Eyenap and a scrapped comic