Pony Fantasy VI Remake

So with B-Run working on Umaro magic on his own and Rydel looking at adding the additional sprites, I'm just onto balance tweaking now.

One thing with event editing. Rydel gave my Strago replacement her own unique Cultist sprite to use for the Cultist Tower. Is there any event coding to have an NPC change their sprite? I'm thinking in the event where Strago is recruited, he jumps off-screen as the cultist and comes back down as himself.