Here’s a helpful guide on — what it is, how it works, and where to find it. What is an RXData Editor? An RXData Editor is a tool used to view, edit, or create .rxdata files. These files are commonly associated with RPG Maker (XP, VX, VX Ace, MV, MZ — depending on version) and Ruby-based game save/export systems , including Pokémon fan games (like Pokémon Essentials).