- This monster's Japanese name's based on the word erekiteru which gave rise to the short form ereki ("electric; electricity") that is the basis for the Japanese names of the "Watt" archetype. The teru part of that word sounds close to tēru ("tail"), which alludes to the "electric tail" that this one has.
- This monster appears in the artwork of "Ancient Rules", which is referenced in this card's flavor text.
- Its Level and its ATK are also referenced in this card's flavor text.
- As "Ancient Rules" was released nearly six years prior to this card, "Wattaildragon" is one of the only Monsters in the game to debut on a Spell or Trap, then only later become a Monster. It shares this distinction with "Warrior of Zera", who first appeared in "Zera Ritual", and "Phantom Gryphon", who first appeared in "Gryphon Wing".
- The hilt on "Warrior of Zera's" sword also bears a slight resemblance to the head of "Waittaildragon".
- The art and flavor text of "Waittaildragon" are similar to DRUMP, a 2013 one-shot manga by Kazuki Takahashi about a blue dragon imprisoned inside a deck of magical playing cards for thousands of years.
- This monster is the first "Watt" monster that isn't a Thunder-type monster, the second "Watt" Normal Monster (after "Wattkid"), and the strongest "Watt" monster in terms of ATK.
- The warning in this card's text about capturing it being a Level 6 offense punishable by imprisonment for 2500 heliocycles at minimum may reference this card being a Level 6, 2500 ATK monster.
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