That is to say, while the various sets used one checklist for its cardssay, perhaps, Aquapolis Quagsire was numbered 30/147 Nintendo also kept track of e-Reader cards using their own systemthe same Aquapolis Quagsire had an e-Reader ID of C-38-#
The copied artifact stays in play, even if the original goes to the graveyard, which means a player can use it to get some pretty powerful artifacts on their side and gain the upper hand against more seasoned players with stronger decks
"Lightray Daedalus" in particular, as it's easy to Summon and specifically targets Field Spells before targeting other cards, and fits neatly into a Deck able to Summon "Judgment Dragon", another powerful destruction engine
Of course, this cool new bug is a sideboard card, but it has applications in a bunch of older formats
During your Main or Battle Phase (Quick Effect): You can return this card to the hand, and if you do, Special Summon 1 "Kuribah", 1 "Kuribee", 1 "Kuriboo", 1 "Kuribeh", and 1 "Kuriboh" from your hand and/or GY in Attack Position