In your character's .def files, ensure the localcoord is set correctly. For a 640x480 screenpack, a localcoord = 320, 240 (standard) or 427, 240 (widescreen) is common, but 640x480 specific characters work best.
You can edit the .def file in Notepad to move the bars via X and Y coordinates. Because the canvas is 640x480, the math is simple (e.g., Center is X=320).
: Interface elements appear cut off, mispositioned, or floating in wrong locations Solution : Verify that your M.U.G.E.N engine resolution is properly set to 640x480. Open mugen.cfg and double-check the GameWidth and GameHeight values. If using M.U.G.E.N 1.1, ensure localcoord = 640,480 in your stage and character definitions.
You need MUGEN 1.0 or 1.1. (Note: 1.1 supports scaling, but 1.0 is more stable for 640x480.)