Scrawling Crawler: To make sure opponents feel the pain of denying Eggman his robots, we must give them more cards to make them discard and fuel our evil
Not only is the creature itself reasonably costed, it comes with anything you need to close the gap between you and your opponent
They are part of the eternal or Commander set, and mainly distributed in paper by the scene boxes themselves, or filtered into the probabilities of the collector boosters
Mostly this is only the case because you can't freely target either this or Innocent Blood
Combine that with Crown Zeniths limited print run and the fact that Deoxys doesnt get this kind of love in every set, and boom: instant chase card
In practical terms, this means your Pokmon can use any attack regardless of what Energy you have attached to them a flexibility that can catch opponents completely off-guard