Mugen Chars [updated] Official

Mugen characters are custom-made characters created by fans using the Mugen editor, which allows users to design and animate their own characters, as well as create their own special moves and combos. These characters can be played in the Mugen game engine, which supports a wide range of fighting game styles and gameplay mechanics.

Explain how to like "Can't open char.def." mugen chars

In the early days, MUGEN chars were mostly "sprites-rips" from classic arcade games like Street Fighter and Marvel vs. Capcom. Creators would extract the art and sound files from these games and script them to work within the MUGEN engine. However, as the community grew, so did the ambition of the creators. Today, MUGEN chars fall into several distinct categories: Mugen characters are custom-made characters created by fans

Edited/Enhanced: Existing characters that have been given new "super moves" or modified mechanics (like "God-tier" characters that fill the screen with lasers). Capcom