Card Trivia:Double Headed Anger Knuckle
- This monster's appearance is based on the "FM H-10-44", a yard switcher locomotive designed to assemble and/or disassemble trains by moving individual railcars.
- This monster's name references the railroad terms "double heading" (the use of two locomotives at the front of a train) and "knuckle coupling" (a mechanism used to connect railway vehicles to form a locomotive).
- "Double Headed" reflects this monster's the two Machine monsters required as Link Material, while "Anger Knuckle" reflects its "angry" appearance and Special Summoning effects.
- The first syllables of the Japanese pronunciation of "Anger Knuckle" (アンガー・ナックル Angā Nakkuru) spells out the name "Anna" (アナ), a character from the Yu-Gi-Oh! ZEXAL anime who uses the Train series.
- "Double Headed" reflects this monster's the two Machine monsters required as Link Material, while "Anger Knuckle" reflects its "angry" appearance and Special Summoning effects.