the answer is goingghst it is a thing he says on the show
type in robot girl
the code is goingghost
the answer practice is unlock training mode
You have to enter ghosttown to unlock his place,then try it and you will be able to use him.
I don't know but i do know that avatar's is air bender (no space) that will help
type goingghost
goingghost
goingghost
chumpie
You cannot unlock him in jingle brawl, you can only unlock him in super fall brawl
go ghost in codes
ghosttown
dannys code is Danny phantom