I somehow managed to patch some Pokemon games with 2 ROM Hacks. The results are interesting. Some games won't boot up at all, and some games are partially unplayable.
In the attachments are the games with 2 ROM hacks patched in and tested to run.
(All attachments) You may need the walk through walls gameshark codes to advance in the game.
(2nd attachment) You will need the walk through walls gameshark code to progress through the intro.
Edit by Torchickens: Removed attachments in interest of copyright.