[Devlog] PKHeX-NX Update — Manual Legal Move Picker + v0.9.3 Polish
Hey everyone,
I've been working on a passion project for a few months and wanted to share a sneak peek and get early feedback before the first public release.
What is it?
PKHeX-NX is a 100% native Nintendo Switch homebrew app that edits Pokémon Scarlet & Violet save files directly on the console. No PC, no pulling the SD card, no dumping tools. It's a from-scratch C++ port of the core concepts behind the legendary PKHeX (not affiliated with the PKHeX team).
CRITICAL: LAUNCH VIA TITLE OVERRIDE
You MUST launch PKHeX-NX via Title Override (hold the [R] button while launching Pokémon Scarlet or Violet from the home menu).
Do NOT launch this app from the Album / Applet Mode, or it will crash/fail to mount your save files due to memory restrictions.
What already works (v0.9.3):
Full save crypto: SHA256 footer verification, xorpad decryption, SCBlock/SCXorShift32 parsing
Box viewer (32×30 grid) with inject / clone / delete / export to .pk9
Stat & trait editor: IVs, EVs, Natures, Tera Types, Force Shiny — with automatic checksum healing
Trainer edits: Name, TID/SID, Money
Legality-aware generator:
Real abilities (Ability 1 / 2 / Hidden)
Manual legal move picker (hand-pick the 4 equipped moves from the species' real learnset)
Level-accurate moves from each species' real level-up learnset, with correct max PP
Growth-correct EXP across all 6 experience curves
Egg generation (valid egg flag, hatch cycles, level-1 moveset)
26-ball picker with correct in-game ball IDs
Scarlet + Violet support with a boot-time game selector
Safety net: byte-verified SD backup before every write, dual-file commit, one-button rollback
Everything is hardware-validated with photographic proof — generated mons render cleanly in-game with correct stats, abilities, and moves.
What's next (v1.0 / v1.1):
SDL2 graphical UI (current build is a text console)
More titles (Legends: Z-A, then Gen 8 codecs)
Bag editor, Living-Dex automator, and more
Why post now?
I'm pre-release and want this community's feedback on features, safety, and direction before I polish the UI and do a full launch. The repo is public if you'd like to follow along or review the code:
https://github.com/cbreezy210/PKHeX-NX
The boring-but-important part:
This is an educational project. Modifying save data always carries risk. The app has a robust backup system, but always keep your own manual backups. Use offline and at your own risk. Not affiliated with PKHeX, Nintendo, or The Pokémon Company.
Screenshots attached: homebrew icon, box viewer, Charmander stat screen, generated Charmander summary, and the new move picker UI.
Thanks for reading — feedback welcome!
---
Edit (Aug 28): Just shipped the Manual Legal Move Picker (M11) and updated the repo! See my reply below for details and screenshots.
Hey everyone,
I've been working on a passion project for a few months and wanted to share a sneak peek and get early feedback before the first public release.
What is it?
PKHeX-NX is a 100% native Nintendo Switch homebrew app that edits Pokémon Scarlet & Violet save files directly on the console. No PC, no pulling the SD card, no dumping tools. It's a from-scratch C++ port of the core concepts behind the legendary PKHeX (not affiliated with the PKHeX team).
CRITICAL: LAUNCH VIA TITLE OVERRIDEYou MUST launch PKHeX-NX via Title Override (hold the [R] button while launching Pokémon Scarlet or Violet from the home menu).
Do NOT launch this app from the Album / Applet Mode, or it will crash/fail to mount your save files due to memory restrictions.
What already works (v0.9.3):
Full save crypto: SHA256 footer verification, xorpad decryption, SCBlock/SCXorShift32 parsing
Box viewer (32×30 grid) with inject / clone / delete / export to .pk9
Stat & trait editor: IVs, EVs, Natures, Tera Types, Force Shiny — with automatic checksum healing
Trainer edits: Name, TID/SID, Money
Legality-aware generator:
Real abilities (Ability 1 / 2 / Hidden)
Manual legal move picker (hand-pick the 4 equipped moves from the species' real learnset)
Level-accurate moves from each species' real level-up learnset, with correct max PP
Growth-correct EXP across all 6 experience curves
Egg generation (valid egg flag, hatch cycles, level-1 moveset)
26-ball picker with correct in-game ball IDs
Scarlet + Violet support with a boot-time game selector
Safety net: byte-verified SD backup before every write, dual-file commit, one-button rollback
Everything is hardware-validated with photographic proof — generated mons render cleanly in-game with correct stats, abilities, and moves.
What's next (v1.0 / v1.1):
SDL2 graphical UI (current build is a text console)
More titles (Legends: Z-A, then Gen 8 codecs)
Bag editor, Living-Dex automator, and more
Why post now?
I'm pre-release and want this community's feedback on features, safety, and direction before I polish the UI and do a full launch. The repo is public if you'd like to follow along or review the code:
https://github.com/cbreezy210/PKHeX-NX
The boring-but-important part:
This is an educational project. Modifying save data always carries risk. The app has a robust backup system, but always keep your own manual backups. Use offline and at your own risk. Not affiliated with PKHeX, Nintendo, or The Pokémon Company.
Screenshots attached: homebrew icon, box viewer, Charmander stat screen, generated Charmander summary, and the new move picker UI.
Thanks for reading — feedback welcome!
---
Edit (Aug 28): Just shipped the Manual Legal Move Picker (M11) and updated the repo! See my reply below for details and screenshots.
Attachments
Last edited by cbreezy210,
The manual legal move picker just landed (v0.9.3), and the next big milestone is the graphical UI. I'll keep the updates coming in this thread!
**Manual Legal Move Picker (M11)**
**Housekeeping & Polish**
