This group is dedicated to the Yu-Gi-Oh! GX cards known as Crystal Beasts, and their user, Jesse (Johan) Andersen.

The Crystal Beasts, known in Japan as the Gem/Jewel Beasts (宝玉獣, Hōgyokujū) are a series of Monster Cards that become Continuous Spell Cards after they are destroyed while monsters. Although weak in terms of actual strength, their aforementioned effects allow them to have great staying power. In addition, they are supplemented by many support cards which utilizes them in their Continuous Spell Card form. This archetype also contains the card, "Rainbow Dragon", the ace card of the Crystal Beasts. It can be summoned quite easily as it can be only be played when there are the seven different Crystal Beasts on the field or in the graveyard.

The Crystal Beasts made their first appearance in the Yu-Gi-Oh! GX anime, used by Jesse Anderson. In the English dub, each one of the Crystal Beast monsters, save "Ruby Carbuncle" imitate the voice of a real life movie celebrity.

Later, when Jesse becomes possessed by Yubel, the Crystal Beasts are transformed into Advanced Crystal Beasts, which look like wilder, more feral armored versions of their original forms, complete with their own ace card, "Rainbow Dark Dragon". Crystal Beast-orientated Spell and Trap Cards work on Advanced Crystal Beasts on the field, since their names are also treated as their "Crystal Beasts" counterparts. But, they have a weakness that they can only be on the field with the Field Spell, "Advanced Dark" in play, otherwise they're all destroyed. And "Rainbow Dark Dragon" can't exist without all of them on the Field or in the Graveyard otherwise it gets removed from play.