Card Trivia:Two-Headed King Rex
- This is one of the cover cards of Booster Chronicle.
- This monster appears in the artwork of "Jurassic Power".
- This monster has a retrained counterpart: "Double-Headed Dino King Rex".
- This monster also has an evolved counterpart: "Mighty Dino King Rex".
- This card is the first Dinosaur monster to be Summoned in the Yu-Gi-Oh! manga and anime.
- In the English dubbed version of the Yu-Gi-Oh! anime, this monster and "Blue-Eyes White Dragon" used each other's Japanese roar sound effects.
- This card shares the same Attribute (EARTH), Level (4), ATK (1600) and DEF (1200) as "Crawling Dragon #2".
- Both cards are also Fusion Material for "Bracchio-raidus".
- The Bandai version of this card is Level 5 with 2500 ATK and 800 DEF, whereas the Konami version is Level 4 with 1600 ATK and 1200 DEF.
- This card's OCG/TCG artwork is taken from Yu-Gi-Oh! Duel 60 (Duelist Duel 1): "Challenge!!", specifically from the panel showing this monster being Summoned.
