Make Pokémon Rome hack yourself (on the 3ds)?

I wanted to ask how you can hack pokemon modules that you can even play on the Nintendo 3ds (as an example like the Youtuber TyranitarTube with Pokémon Sun Extreme randomizer that he plays this Rome hack on his 3Ds) I would like to do something myself with the Game, just the designes and so change.

So, you need a client first. You can program this with different languages, such as. JavaScript.

Another possibility would be to carry out a transmission through the charging cable, but this is more difficult.

Have a good time

It's like modding and mapping for CS: GO, Civ6 and other games. You have to learn it either through an existing modder or through tutorials.