My guess is, SML2 storyline aside, that he's either a creation of Kamek's or a ticked off video game character named Aldo that had his memory altered/fried by lightning, hence the lightning bolt style to his mustache.
And for those who aren't familiar with the character, do a search for a game called 'Aldo's Adventure'. It's a nice little DK clone that has new levels consistantly being added with each version.
Signed
Warewolf at Large
