ドクロべえ is an enemy that uses another enemy as a disguise before it reveals itself. Oddly enough the ninja cat Kurobei from Ganbare Goemon uses a disguise when you first meet it. It can't be a coincidence given the similarities, but I don't know what the hell is going on. Anyone got any ideas/theories on this one?
Just to be clear, I think there's a good possibility that this name might possibly be a pun. If that is the case, I would not want to translate it as Dokurobei and would rather translate the spirit of it instead, so the player can understand the joke, if there is one.
This appears to be a Yatterman reference and/or a lazy joke. Googling the name gave me this instead.
Apparently they swapped the Katakana with a Hiragana, which I guess is the equivalent of using Caps in English.