There are many mugen screenpacks . Most of which you can get at mugenation.net
or mugen-infantry.net . when you find the one you want download from authors site
and unzip to your mugen folder.there you go! NOTE: backup your select.def file before unzipping so you can add easier. :)
It's complicated to say in text so go to youtube.com and look up How to install screenpacks for mugen and when u find a guy with a koreanish voice he can tell u wat 2 do
To download the Marvel Super Heroes screenpack for M.U.G.E.N, first, search for reputable M.U.G.E.N community websites or forums where the screenpack is hosted. Once you find a reliable source, download the screenpack file, usually in a ZIP or RAR format. Extract the contents to your M.U.G.E.N directory, typically placing the files in the "data", "chars", and "system" folders as needed. Finally, configure your M.U.G.E.N to use the new screenpack by updating the "select.def" file to include any characters you want to use.
The Everything vs Everything screenpack is free, just check out sites like Mugen Databse. However, you have to manually download characters. Usually full rosters of EvE(everything vs everything) can be over 5-10 gb.
What is Mugen?
Extract it to your mugen folder
mugen does not work anymore
mugen batlle
My personal favorite sites are mugenation.net and mugen-infantry.net you can find almost anything for mugen.
Mugen Motorsports was created in 1973.
Mugen Power was created in 1979.
Mugen Kigen was created in 2007.
Mugen Keitai Disgaea was created in 2004.