@thevhswizard Totally possible; just include the world name. This will be part of a composite primary key and define a separate area of the dex for each source.

You can forget about any kind of unified dex outside of series, but by splitting it out by world (series name?) you can avoid conflicts.

The rest is as simple as including the individual graphics. GIF allows for easy palette swapping (or at least that's what I use with indexed palettes).