unassumingvenusaur:

1. Well, first, you’re going to need to find a way to install homebrew onto your 3DS. If you’re on the latest system version your only real options are to use Ninjihax or Oothax.

2. Once you’ve installed homebrew, you’re going to want to use the program braindump on your copy of Fates (this only works for physical copies) and use this extractor to extract the contents of the romfs file.

3. Locate the file GameData.bin.lz contained within the folder “GameData” in the extracted romfs. Open the file in a hex editor like HxD, delete the first four bytes, save, and decompress the edited file using BatchLZ77.

4. Open the decompressed file in the hex editor once more and scroll down to the offset 0xADF0, which is a table of pointers to each character’’s support table. F!Corrin’s is the third one listed and Felicia’s is the 30th. Don’t forget to flip the bytes and add 20!

5. Go to F!Corrin’s support table and find her support with Felicia, which will start with the bytes 04 00. Change the eighth byte of the support, FF, to 12. Then go to Felicia’s support table and do the same to her F!Corrin support, which will start with the bytes 02 00.

6. Save and recompress the file with BatchLZ77. Stick this edited Gamedata.bin.lz back into your romfs and rebuild it. Give the rebuilt romfs the appropriate name and run the patch through HANS. If all went well, you should now see an S Support option for Felicia and F!Corrin! Grind up their support ranks to the point you can activate S Support.

7. Then, you can finally gay marry Felicia…but wait! We need to add in dialogue! Locate the file フェリシア_プレイヤー女.bin.lz in m/@E, decompress it with FEAT and open it. The easiest thing to do next would be to copy/paste the S Support from M!Corrin and Felicia’s file (フェリシア_プレイヤー男.bin.lz) and change the appropriate katakana and gendered language.

8. Rebuild the file with FEAT and stick it in your game! Activate the S Support and voila! Instant gay!

9. Follow this guide to claim your gay baby!

And the final, most important step: