Not sure if mentioned (and not that it affects SSB at all), but Pac-Man returns in the new Mario Kart Arcade GP DX. Here's the design used (GP2 art below for reference as well):
Exact same design used in Hot Shots Gold: World Invitational (...what?), where he is DLC.
You can tell Namco wants to promote the new design. Honestly, I don't mind it the Pac-Man Party design at all (personally, I wouldn't make his hands look like they are removable, but otherwise it's decent), but I take issue on Pac-Man's depiction in Ghostly Adventures. First of all, the creepy teeth. But most importantly, Pac-Man is supposed to be a gentleman, not some goofy teenager. If said design is used on that context (and without the creepy teeth), I'll take it. If that's not supposed to be the Pac-Gentleman, I'd rather they use the GP2 design.