Zero is a recurring enemy, starting from as early as the second game boy game. He has also appeared in Dreamland 3 and then in Kirby 64, though it isn’t til 64 that he was called Zero two (I think, I could be wrong on that last one…). It’s also implied that he was responsible for the events in Canvas Curse, though there’s nothing concrete either way.
So, is this dude in multiple Kirby games or shows(?), or is it just a huge coincidence that the bad guy from the only Kirby game I’ve ever played gets referenced a lot?