If the character appears as a blank square or crashes the game, it may be intended for an older or newer version of the engine than the one you are running. If you'd like to dive deeper, I can explain: How to fix common crashes when adding new characters. Where to find Ikemen GO for a more modern experience.
: It primarily features "Slime" characters—common tropes in fantasy and adult media—reimagined as fighters. These characters often have unique mechanics related to transformation or capture during combat. The M.U.G.E.N Engine mugen-h-slime-plus
: Characters from Street Fighter , The King of Fighters , and various popular anime series. If the character appears as a blank square
: Not all standard MUGEN characters will react to the slime mechanics unless they have been specifically "patched" or coded with the necessary variables. : Not all standard MUGEN characters will react
M.U.G.E.N is . However, since these "Slime Plus" builds are community-made and often include copyrighted characters from various franchises, they exist in a legal "grey area." Always ensure you are downloading from reputable community sites to avoid malware.