splathex has been discontinued.
if you just want to edit gear abilities tho, and don't mind trying something experimental, I've been working on a gear editor overlay that lets you edit gear abilities directly in the game: https://github.com/3096/octotech/releases/tag/0.0.1
the game checks if you have the dlc installed or not, so save editing wouldn't work as the game will simply not show any dlc gear if you don't have those dlcs. so you might want to check out something like aoc mitm instead.
You can use the support edit overlay I just released: https://gbatemp.net/threads/fire-emblem-three-houses-three-useful-overlay-utils.570751/
I don't know about 1, but for 2 you can use the class edit overlay I just released...
I recently wrote some overlays for FE3H, thought I'd share them here.
## Item Trainer
## Class Edit
## Support Edit
**Jacien** - for being the benefactor of this project as well as providing info and testing. This project would not have taken place without him.
@Falo - for...