I have a site for custom animations. I would like you guys to contribute to it. These animations range from decapitation to midnight bliss, humiliation dance, custom end screens(Like the one in Street Fighter 2) and many more. Note that there's not much on it but it will grow.
https://mugen-custom-animations.fandom.com/wiki/Mugen_Custom_Animations_Wiki
If a special animation isn't listed, please make a page of it.