Not much. Every time your spirit levels, you get another copy of the card that it represents (as those cards cannot be obtained in the game otherwise).
For example, if you had just gotten a Jerry Beans Man spirit, you automatically receive one copy of Jerry Beans Man. Each time he levels, you receive another copy of Jerry Beans Man.
cockerspaniels that is all.
level up!
no you cant
Dark Zane.
search yugioh wikia in google and go to the card ruling section and search for spirit caller......
its the god cards man. or exodia
he comes in the heros pack
you face him when he is a shadow rider
level 10
there is no such a code... sucks
"Yu-Gi-Oh! GX Spirit Caller" is a Nintendo DS game in which you go through many of the "Adventures" that Jaden Yuki went through and can collect Duel Spirits that you occasionally find.
After a while at night you hear someone calling you so go to the north and go to a new place called 'dried well' and you'll get it.