In the (2D fighting game engine) community, an “Anime Mugen” refers to a custom build (screenpack + roster) featuring characters from various anime, not just one series. “340 characters full” usually means:
The remains the king of "general anime crossover" because it loads faster than 500-character builds and has fewer broken characters than the 200-character "lite" builds. anime mugen 340 characters full
If you want, I can: