[SIZE=21pt]I have a debuged Tamagotchi v2 and I was scrolling through the characters, when I saw the Costume as a character and the Stuffed Animal as a character, both as tamagotchis that you could choose... maybe they're special characters and when you put on the costume, you got the character, but I'm not totally sure [/SIZE]
I know how to get it off. Make it go to sleep by setting the time to 1:00 AM and wait a minute or so. Then change the time back to it's original place, then the tamagotchi should be back to normal.
The same thing happened to mine, actually first I used the stuffed animal and he turned into a panda looking character, that wouldn't come off so I used the costume.. now that wont come off! I also think that using those two items creates a new character.