I see a lot of human versions of the Undertale characters and I kinda wanted to join in. I thought that it would be fun to make my own version of the skeleton brothers. I guess you could say it's almost like a headcanon (it most likely is). I like the idea of them not being biological brothers and more like close friends that will tell everyone that they are in fact brother's. They tend to say it so often that they themselves now believe that it's true. I also thought that it would be funny if sans was like " yeah we're totally brother's. See we have the same hair color." It sounded funnier in my head at 4:30 in the morning.
Paint tool Sai