Bag Tab: [Search] [ Pocket: All ] Table: Item | Quantity | Pocket Potion 10 Medicine Poké Ball 5 Poké Balls ...
:trainer => Player object (name, gender, badges, money) :party => Array of Pokemon objects :storage_system => PC box storage :bag => Bag hash (item IDs → quantities) :system => Options, volume, text speed :switches => Array of boolean switches (global events) :variables => Array of numeric variables :self_switches => Hash of map/event/switch state :last_map_id => Integer
The best editors (like PKHeX for mainline) inspire because they are . Aim to make yours the go‑to tool for the Essentials community. Would you like a starter code template for the Marshal parser in Python, or a deep dive on reconstructing the PokeBattle_Pokemon class from raw Ruby dumps?
If using pure Marshal parser, replicate Ruby’s classes:
class Pokemon: def __init__(self): self.species = None self.level = 5 ... rxdata.register_class('PokeBattle_Pokemon', Pokemon) pkmn = save_data[':party'][0] pkmn.level = 100 pkmn.item = ':MASTERBALL' pkmn.moves = [:THUNDERBOLT, :IRON_TAIL, :QUICK_ATTACK, :DOUBLE_TEAM] # Recalculate stats pkmn.calc_stats() 5.3 Saving Back with open('Game.rxdata', 'wb') as f: rxdata.dump(save_data, f) Critical : Ensure all objects are exactly as Ruby expects – same class names, same instance variables, same order. Adding extra attributes will crash the game. 6. Handling Pokémon Essentials Versions | Version | Save structure | Notable changes | |---------|---------------|------------------| | v17–18 | $PokemonSave as array | Party stored as PokeBattle_Pokemon | | v19 | $Trainer , $PokemonStorage | Moved to global variables | | v20+ | Same as v19 + $player alias | Added species form handling, dynamax flag |
1. Introduction Pokémon fan games created with RPG Maker XP (using Pokémon Essentials, now Pokémon SDK) have exploded in popularity. These games store player data in Game.rxdata files — a serialized Ruby object dump. Unlike mainline Pokémon games (which use custom binary formats with checksums), RPG Maker saves are surprisingly accessible if you understand Ruby’s Marshal format.