Kof Theory Mercenary Screenpack 400 Slots Down...

If you are searching for the screenpack because a previous download failed or the file was corrupted, here are the common pitfalls:

For years, this was the standard for "large roster" builds. But as characters became more complex (1.1 coding, high-res sprites), the old 1.0 version of this screenpack began to collapse under its own weight.

If you have an old version that only shows 200 slots, you need to edit the system.def file.

Open data/system.def (or data/mugen1/system.def). Find the [Select Info] section. Change these values: KOF Theory Mercenary Screenpack 400 Slots Down...

rows = 20
columns = 20

Yes, 20x20 equals 400. However, the default MUGEN font spacing might overlap. You must also adjust:

spacing = 16,8 ; (Adjust X and Y so portraits don't touch)

Usually defined in [Select Screen]:

cell.size = 25, 25       ; port size
p1.visible.grid = 10, 10 ; show 10x10 at once
p1.offset = 0,0

Make sure cursor movement wraps correctly:
In [Files] section, check sff and spr for page arrows. If you are searching for the screenpack because

For MUGEN enthusiasts who grew up in the era of WinMUGEN and early 1.0, the KOF Theory Mercenary screenpack holds a legendary status. Known for its gritty, "story-mode" aesthetic and intense King of Fighters vibe, it remains a favorite for creators building massive rosters.

If you are looking for the 400-slot expansion and finding dead links, here is a guide on the screenpack, its features, and where to look.

If you searched "KOF Theory Mercenary Screenpack 400 Slots Down," you likely hit a wall. This is common in the MUGEN community for several reasons: If you have an old version that only

Just list 400 character entries (one per line).
Use a text editor with column editing (Notepad++, VS Code) to duplicate ; placeholder lines.

Example placeholder line: