I played around a little with Mustadio's sprite. But now I have 2 Mustadios in my team, the one that joins and the Guest Mustadio.
Any way to remove guests from your team?
Dismiss him.
of course we all know that doesn't work.
if its for a specific save you could set it up so that in ENTD it places the guest one in your party for the next event battle using "loadformation" and then kill him off there
if its for playthrus in general you need to make sure that guest never joins up in the first place or change the id of the unit removed in the event file to match that of the guest thats stuck.
the removal of specific guest ID's are controlled by the event file.
kk, lemme give that a shot.
I'll let you know if it worked
Edit
- Well, I did what you said. Placed the Guest Mustadio in the next story line battle and turned him into a treasure chest. But he's still there

Good thing he's number 19 in my team, so I'm still able to get all the other 'special' chars.
Oh, wait, he's still a Guest. Sorry, I thought you meant he joined as a permanent unit.
FFTastic.
The download is available on this forum. Just convert your savegame file to .gme if needed, then you should be able to just delete the poor bastard. If not, change his flag from guest to active, then bring him into a random and kill him yourself.
Gameshark can probably do the same thing, too.