Inspired by recent rumors about Super Smash Bros. Ultimate, the latest installment in Delzethin's Challenger Approaching series focuses on the wearer of Majora's Mask himself, Skull Kid.
While he he doesn't bring much new to the table in terms of mechanics, he's got a unique enough playstyle overall to not really warrant it. He's a tricky mixup/hit-and-run character with some odd movement properties - namely a high air acceleration paired with a high fall speed. Visually, Skull Kid's animations would emphasize the playful creepiness of his character in his source material, as well as the fact that the mask may control him as much as he controls it.
While this character concept gives him a few playful swipes for tilts and a jab combo that ends with a two-handed push, he's also got a few moves where Majora's Mask takes over, sprouting tentacles or simply dragging Skull Kid's body around like a rag doll. Meanwhile his specials are all based on the guardians of Termina's four temples, each one manifesting the boss's remains around Skull Kid.
For full information on Delzethin's character concept, be sure to check out the full video.