because dark raibow dragon and stuff arent jessey its YUBEL DUMB BITCHmaybe because they havent released the fourth season yetSome of them are Anime exclusive.Because the Advanced Crystal Beasts would make the old versions of the cards obsolete. They were just for a plot in the show and would be redundant to really make. They were likely to powerful, considering the already tough abilities of the original Crystal Beasts.