1. Overview Rxdata is a file extension associated with RPG Maker XP (and later versions like VX/VX Ace, though with differences). It is a serialized data file created by Ruby’s Marshal.dump method. These files store game save data, game system configurations, or map information. The most common usage is in Pokémon fan games (e.g., Pokémon Essentials ), where Game.rxdata holds the player’s save.
# inspect structure save = load_data("Game.rxdata") puts save.class # Hash or GameData object puts save.keys # list top-level keys require 'zlib' data = File.binread("Game.rxdata") begin Zlib::Inflate.inflate(data) puts "Compressed save" rescue puts "Uncompressed" end save editor rxdata
The exact keys ( :money , :bag , :party ) depend on the game’s script. Pokémon Essentials v19+ uses different structures than v17. Many fan games implement anti-tamper mechanisms : These files store game save data, game system
  
