Like Original Grigri and Original Zina's motive, his plan is to raid any places on finding any candy that he and the Mascrapules can eat. However, the original counterparts of Les Pyjamasques are always here to thwart their plans from getting away with it.
Original Ulbert's powers are identical to his mainstream counterpart, so there's no difference to his powers.
He appears less bratty and spoiled than his modern counterpart, but he still retains his mischief mindset towards the Pyjamasques.
Original Ulbert is identical to Ulbert, but what's different is that he doesn't have a lump at his head that resembles of a worm's head.