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PKHeX is a save file editor for main-series Pokémon games.
Version 22.12.18 adds:
For the uninitiated, PKHeX is a desktop application (Windows, Linux via Mono, and macOS) that allows users to read and write save data from Nintendo Pokémon games. It is not a ROM hack or emulator; rather, it works with raw save files dumped from official cartridges or digital copies using tools like Checkpoint (3DS), JKSV (Switch), or a hacked console.
The software validates the legality of Pokémon, items, and events, ensuring that any modified data remains “legal”—meaning it could have been obtained through normal gameplay, even if it wasn’t.
The primary focus of the December 2022 builds was stabilizing the editor for Generation 9. pkhex 22.12.18
Yes, but only in specific scenarios. If you are a retro modder, running an older emulator build, or working on a Gen 9 ROM hack that predates The Teal Mask, PKHeX 22.12.18 is a reliable time capsule. For everyone else—especially those playing Scarlet/Violet with DLC or planning to use Pokémon HOME—you absolutely must upgrade to a 2024 or 2025 build.
That said, the 22.12.18 release remains a historical milestone. It represents the moment the PKHeX community rallied to decode Gen 9’s chaotic launch, delivering a stable tool when the official games were still riddled with performance issues and missing features. For that reason alone, it deserves recognition in the annals of Pokémon utility history.
Disclaimer: PKHeX is intended for personal use with legally obtained game backups. Editing saves for online cheating, ranked battles, or distribution of hacked Pokémon violates Nintendo’s Terms of Service. Use at your own risk, and always respect the integrity of official play. PKHeX is a save file editor for main-series Pokémon games
Have you used PKHeX 22.12.18? Share your experiences in the comments below or join our Discord for save editing discussions.
While powerful, PKHeX 22.12.18 is not perfect:
Because PKHeX is open source, you can find archived versions on GitHub or trusted romhacking repositories. Search for “PKHeX 22.12.18 release” and look for a .zip file containing PKHeX.exe. Always avoid third-party re-upload sites that might inject malware. Stick to the official GitHub releases page (look under “Assets” for the archived build). For the uninitiated, PKHeX is a desktop application
PKHeX is a free, open-source save editor for the mainline Pokémon games (Generation 1 through 9). Version 22.12.18, released in late December 2022, arrived during a pivotal time—shortly after the launch of Pokémon Scarlet & Violet—and offered critical early support for the Gen 9 games.
For collectors, PKHeX is the ultimate archive tool. The 22.12.18 release introduced vital updates to the internal legality checks. In the world of Pokémon editing, "legality" is everything; if a Pokémon's data doesn't match what is naturally possible in the game, it becomes a "bad egg" (unusable or likely to be banned in online play).
This update refined the legality engines for: