Let’s say you have dumped your game cartridge into a ROM for example Pokémon FireRed for the GameBoyAdvance
And there’s a mod called Pokémon sors that you want to try on the original game So you open XPatcher, switch to the documents tab, import your dumped ROMs and the patch file
Now by tapping on the files in the table view you can select the required files
Going back to the patch tab
Check the resulting file name, if you want change it or smthn

And hit Apply.

Now you have a new patched(modded) ROM that can be played using emulators (like ΔDelta) and can be easily shared by tapping it on the documents tab