Card Trivia:Vylon Tetra
- The "Tetra" in this card's name is Latin for "four"; this monster's body is in the shape of a tetrahedron, a three-dimensional shape with four sides.
- "Evigishki Tetrogre" wears armor resembling this monster in its card artwork.
- In the Master Guide 3 card storylines, "Tetrogre" is the result of "Gishki Noellia" merging with this monster in order to fight against the "Steelswarm".