Version History

PKHeX Release Changelog

Track bug fixes, legality definition updates, save file parsing improvements, and new features introduced in each official PKHeX release.

Version 25/11/07

Latest Build

Date: November 07, 2025

Key Fixes & Updates

Inventory Edits: Fixed inventory edits; added Diancite, Delphoxite, and Sport Ball as released items.
Legality Checks: Improved checks for Z-A (wild encounter location ID recognition outside of Wild Areas remains work-in-progress).
Gen9a Pokédex: Edits now retain Charizard-Y mega seen bitflag; registering sets applicable alternate form flags matching in-game mechanics.
Gen9a Inventories & Items: Inventory editor no longer treats all acquired items as “NEW” when saving or modifies Colorful Screw quantity on “give all”. Fixed LATAM species names loading.
Scale & Save I/O: Scale evaluation now uses less-detailed size labels matching in-game appearance; fixed Gen9a Box/PC data file I/O operations.
PKM Viewing: Friendship value now loads correctly when inspecting a PKM.

Added Features

Gen9a Editors: Event Flag editor shows more event block tabs with updated block names; Fashion editor can give all items owned (hold Shift for all tabs); Trainer editor added a button to collect all Colorful Screws.
Gen9 S/V Fashion Editor: Added S/V Fashion Editor matching Z-A’s new fashion editor features.
ConfigSave & Encounter DB: ConfigSave in Block Data allows setting text speed to 3 (instant); Encounter DB can modify Encounter Criteria directly instead of inferring from main window tabs.

v25.10.26

Date: October 26, 2025

Legends: Z-A Initial Support

Legends: Z-A Integration: Initial support added for recognizing and generating encounters from Z-A. Encounters trace back to an RNG seed (shiny roll calculations >15s performed for non-shiny 1-rolls).
Ability Editing: GUI forced into All-Abilities mode due to game mechanics not updating Pokémon ability on evolution.
Gen9a Editors: Added Pokédex, Trainer Info, Event block, and Fashion block editors.
Save Verification: Added Bulk (Verify All) check for save file issues (mismatched Fused slots, Mega stone inventory state issues).

v25.09.25

Date: September 25, 2025

Updates & Fixes

Legality: Added Shiny Miraidon/Koraidon mystery gifts, Ruins gifts, and Reg J mythical participation ribbon legality.
Zipped Save Files: Added native support for loading and export-updating zipped save files/folders.
Fixes: PK1=>PK2 conversion no longer errors; Gen2 Japanese Crystal save files detect properly; Status browser is now localized.

v25.06.09

Date: June 09, 2025

Updates & Improvements

Legality & Speed: Re-serialized levelup/eggmove/evolve resources to a compact format, improving application startup speed. Updated word filters.
Fixes: Gen3 XD trainer ID checks no longer required for PAL copies; Gen8 PLA purchased/master flag check regression resolved; Gen9 inventory edits near list ends fixed.
Gen4 PBR & Transfers: Gen4 PBR box names and play time available for editing. Gen3 nickname encoding improved when transferring between International and Japanese games.

v25.05.18

Date: May 18, 2025

Key Features & Fixes

Legality Rules: Added Gen3/4 egg PID program settings toggle; Gen3 XD Poké Spot IV animation checking; Gen2 Stadium move reminder learnset support.
UI Controls: Scrolling mouse over EXP/Level/IV/EV/Friendship text boxes increments/decrements values. ShowdownSet parsing/exporting rewritten for localization and flexibility.
Save Handling: Gen1 Stadium boxes initialize and compress storage on save. Gen4 Battle Revolution recognizes save language; Gen4 group seed editing added.

v25.02.23

Date: February 23, 2025

Runtime & Features

Runtime: Upgraded runtime requirement to .NET 9.0 Runtime.
HOME Gifts & Legality: Added HOME gifts (Meltan, Keldeo, Manaphy, Enamorus); Gen7b Received DateTime validation; Gen1 Tour Mews; Gen4 Pokewalker initial seeds/IV validation; Current PP verifier.
Editors: Added Hall of Fame editors for Gen1 and Gen3, plus Gen3 Secret Base editor. Improved sprite generation performance.