Heh, long title.
Anyway, I noticed this the other day when levelling my mule in Saruta, if you change the .dat files of mobs to another one, when they use a TP move that has an animation that strays from the regular animations of mobs (like all mobs have an attack animation) they get really WTFBBQ'd.
Example I've changed my rabbit's sprite to a Goobbue; here's one using Spinning Attack:
http://img415.imageshack.us/my.php?image=sie051010225101a7xp.jpg
And here's a rabbit in Bibiki using some random move (It's a bit dark)
http://img415.imageshack.us/my.php?image=jac051012175616a9jg.jpg
I've had some weirder instances of this that made me fall out of my chair laughing, but my screenshot folder was full so I couldn't get any pics.