Numa Dude
Smash Lord
Bio taken from wikipedia: The bizarre man known as the Happy Mask Salesman first appeared in Ocarina of Time, offering to let Link work for him as a Happy Mask Salesman. After selling all the masks, Link receives the Mask of Truth, allowing him to understand what the Gossip Stones say.
In Majora's Mask, the Happy Mask Salesman played a major role, as it was his mask, dubbed Majora's Mask, that the Skull Kid had stolen and was planning to use to destroy Termina. Asking the transformed Link for help and returning him to his original form, he teaches the hero the Song of Healing, one of the songs used several times throughout the game. When Link finally returns the mask to him, he simply vanishes. The Happy Mask Salesman is best known for his volatile temper, his wacky theme tune (which is in fact a remix of the Song of Healing) and his ability to change position without moving ie. without occupying any intervening frames. In a particular scene, the Happy Mask Salesman plays on a massive organ that appears seemingly out of nowhere. This organ is used to teach Link (still in his Deku Scrub form) the Song of Healing. This scene is considered by many fans to be one of the more comical scenes in the Zelda series. It is interesting to note that in The Legend of Zelda: Majora's Mask, walking behind the Happy Mask Salesman reveals masks resembling the faces of Mario, Darth Maul, the face on the Mirror Shield, and a sad Elvis Presley on his large backpack, which can also be seen in his artwork.
His most recent appearance was in Oracle of Ages. He owns a shop on the outskirts of Labrynna Town, and is very hungry, and will give the player a Mask in exchange for something to eat.
His origins are unknown, as he may either be from Hyrule or the parallel universe Termina, and it is never established which. A theory is that he, a supposed Ocarina of Time character, does not have a Termina double. He was introduced in Ocarina of Time when he gives you the Keaton mask from his shop in Hyrule, but he also knows how to travel from Hyrule to Termina, which could mean that he is native to either land, or possibly somewhere else.
Near the end of Majora's Mask, Link travels to the moon and meets kids who resemble the mask salesman. One of them even hints that all of them are destined to become mask salesmen. This adds many questions to the origin of the Mask Salesman. The Mask Salesman, knowing of the apocalyptic nature of the Majora's Mask, hints that he has experienced it firsthand. Further with this evidence is if the Moon falls, it will show you with The Mask Salesman, and he will say, "You have met with a terrible fate, haven't you?" Given this shows hints of a type of immortality, or an ability to reset things to the way they were, as perhaps he has had to do this before, or deal with Majora himself. Some fans have speculated that he represents the series creator Shigeru Miyamoto, due to his eccentricity and his similar appearance.
It should also be noted that there is a masked salesman in The Wind Waker, but he's not happy.
I think this guy may have a chance . (a small chance but a chance) I think this guy would be a perfect WTF character because no one would expect him. He has also been a recuring character so that increases his chances slightly.
His moveset will have to do with masks and his mood.
For example his B would be change his mood and that would change his A attacks to suit his mood. Like if he is angry he will have boosted power and lower speed and his side B would be he throws a mask.