yes, when you enter the dungeon of exodia, you have to unleash your xargon warrior's special ability, and you will fight the grand challenger. after defeating him, take his 44th card(the crystal beast dragon) next go in any battle and special fuse it with the rainbow dragon. hope this helps :)
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you cant :(, i used a cheat to get infinte copies of every card and i go real sick cards like the 3 god cards and sacred god cards, but sadly there were no crystal beasts or rainbow dragon...
you have to beat the game you have to beat the game
There are two easy ways to beat Jaden in spirit caller. First- you high 2000 defense monsters in order to summon the cards like Blue eyes white dragon or any other good card. second- If you have it use level monsters with a couple of level-ups and mist bodies.
from atticus have to battle him a lot
Once you reach level 22 in "Spirit Caller", you will unlock the booster pack "Wrath of Evil" which contains Cyber-Stein.