Card Trivia:Ultimate Crystal Rainbow Dragon Overdrive
- This is the cover card of Structure Deck: Legend of the Crystals/Structure Deck: Legend of the Crystal Beasts.
- This monster is an upgraded Fusion form of "Rainbow Dragon".
- This card's name is a reference to the effect name of "Rainbow Dragon" in the Yu-Gi-Oh! GX anime: "Rainbow Overdrive" (レインボー・オーバードライブ Reinbō Ōbādoraibu).
- This card's effect to gain 7000 ATK while the player has 7 or more banished "Crystal Beast" monsters with different names is also a reference to the effect of "Rainbow Dragon" to send all "Crystal Beast" monsters the player controls to the GY and gain 1000 ATK for each monster sent to the GY.
- This card is a counterpart of "Rainbow Overdragon".
- Both are Level 12 Fusion Monsters with 4000 ATK and 0 DEF.
- Both are upgraded forms of "Rainbow Dragon".
- Both require 7 "Crystal Beast" monsters as Fusion Materials; this card also requires an "Ultimate Crystal" monster as material.
- This card's name is based on the effect name of "Rainbow Dragon" in the Yu-Gi-Oh! GX anime, while the name of "Rainbow Overdragon" is based on the Japanese attack name of "Rainbow Dragon", "Over the Rainbow" (オーバー・ザ・レインボー Ōbā za Reinbō).
- This card has the highest specific number of Fusion Materials (8) of all Fusion Monsters in the OCG/TCG.
- This is the first "Ultimate Crystal" monster not to have an archetype condition in the TCG.
