ATV's name comes from his in-game name, AATTVVV. "All Terrain Vehicles" are commonly referred to as "ATVs", and the Hivemind simply replaced "Vehicle" with "Venomoth".
"Dragonslayer", another and less common nickname, comes from ATV's defeat of Lance's Dragonite even though ATV was little more than half its level.
HistoryEditATV was considered an afterthought, just being "That one pokemon filling the 6th slot since Bloody Sunday" by many, until the moment when he defeated Lance's Dragonite by himself. The Gen 1 AI was programmed to always use attacks that would be super effective, but the PP of moves was not tracked on enemy Pokemon and did not differentiate non-damaging attacks from damaging ones. This led to the perpetual use of either Agility or Barrier, which raise the user's Speed and Defense by two stages respectively. Because ATV had used Poison Powder on Dragonite at the beginning of the match, ATV remained unharmed while Dragonite slowly lost health to the poison and eventually fainted.
During Red's run in the Elite Four in Generation 1, ATV famously defeated Lance's level 62 Dragonite which was more powerful than ATV, being level 36 (video). This caused many to dub ATV the "Dragonslayer".
When AJ fought Red in Generation 2, Katie and ATV were said to have a rivalry, ATV being the Dragonslayer and Katie being a Dragonite. Katie eventually defeated ATV.
ATV would return with the rest of the original Hall of Fame team when Red was battled by CLY in Black 2, in Red Anniversary under Dream Red, and in Anniversary Crystal when Red was battled at the entrance to Mt Silver.
- ATV is the subject of the song "All-Terrain Victory" by Church of the Helix Choir.