Applying a memory patch (commonly the 4GB/LAA patch) to your mugen.exe is highly recommended for modern setups, especially if you use high-resolution stages or high-definition (HD) characters. 4GB patch and 6GB patch | Tom's Hardware Forum
If the above sounds like hacky voodoo, there is a better way. is a modern, open-source rewrite of the MUGEN engine. Because it has a native 64-bit version , it has no memory limit. mugen+6gb+patch