Its a versatile tool against decks lacking in-theme omni-negates, and early testing shows promise across multiple lists
During your Main Phase, if this card is in your GY: You can target 1 Xyz Monster on the field
UR Ultra Rare Disposable Learner Device X SPELL Equip The equipped monster gains 200 ATK for each monster in your GY
This DS title, though, takes a different turn -- it casts you as an all-new character, starting off in the slums of Satellite just like Yusei did and offering an RPG-like Story Mode that has your hero (whom you customize and name) finding and befriending characters from the show, recovering lost memories to overcome the (admittedly cliched) amnesia that afflicts him at the story's start, and doing lots and lots of dueling
These are some Yu-Gi-Oh card passwords for almost any GBA Yu-Gi-Oh game
This will be incredibly cool to pull off if you kill your opponent with it, but as humans are bound to the laws of probability (and also because the card was changed for the real game), it's not going to be the smasher that it was in the anime, as there's just a hell of a lot of factors that need to work out in your favor