Since it's release in 2015, undertale has been a game beloved by millions. It was realeased on the Nintendo switch console in 2018. The video game Super Smash Bros Ultimate is also a very popular game. The character Sans from undertale is arguably the best character in the game. I believe that Sans should be added as a playable character in smash. It seems that Nintendo has a very good relationship with Toby Fox, as his new game, Deltarune, was released on the Nintendo switch before any other console. I think sans would make a great addition to the Super Smash Bros Ultimate roster.