Going back to Four Swords and what I've read in various FAQs, each of the three Epic basically has something like three different possible "settings" (main map) and each of those has a location where one of four or five different "parts" will appear.
Assuming someone was capable of emulating Four Swords with multiplayer and everything and putting aside minor variations due to the number of players, and could manage to access all the variations, you could simply it like in the Nintendo Power guide for the game: show the 3 main maps for each epic with an empty square, and beside it show the 4 or 5 possible parts that can theoretically fill that square.
I tried to do it once using no$gba which supports multiple Game Boys on the same computer, but either my rom was corrupt or the version I was using wasn't emulating the game correctly, leading to garbled graphics and the multiplayer not being detected.
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Current projects: Ristar-The Shooting Star (Gen), Sonic The Hedgehog (Gen), Sonic CD (Sega CD), Mega Man Zero (GBA), Battletoads (NES), Bucky O'Hare (NES)