Muitas pessoas perguntam isso...
Tem como deixar o mugen iniciar em fullscreen, e eu respondo tem !!!
É muito simples vá até essa linha do mugen.cfg dentro da pasta data do seu mugen e modifique pra fullscreen ! ;DirectX mode
;Choose from Hardware, Software, Windowed, Overlay, Safe and None
;Hardware and Software run in full-screen. Windowed and Overlay
;run in a window. The windowed modes require you to set Depth to
;whatever color depth you are using for you desktop. The best results
;are when you run in 16-bit color. There is no advantage to running
;in 32-bit color. If Hardware, Software and Windowed fail, try Safe.
;None uses GDI to draw, so it's very slow. Use None only if
;you cannot get anything else to work.
;Overlay is not supported by all video cards, but can be faster than
;Windowed if it works.
DXmode = Windowred ___Mude aki pra Fullscreen___
Flow pessoal
