Is this from the Japanese manual or something? Because it's not in the English manual, and not in the guide. Note how SB4-ish his body looks (being all tiny with long limbs). And the chin has been lengthened, sort of like back in SB2. Also, the emblem is huge, like Brain Bomber's is in the new art. Must have a very different artist now, eh?
The text (aside from "Magnet Dragon") says
変身前 - Before transformation
変身後 - After transformation