Expy Kit is an add-on designed to streamline character animation pipelines by enabling the export of Rigify characters to game engines and generating Rigify controls over existing armatures. It simplifies the process of uploading characters to services like Mixamo and mapping motion capture data back to standard rigs.

The toolset includes utilities for binding armatures, retargeting IK rolls, matching world space poses, and baking actions. It features automated bone name conversion and root motion transfer capabilities. Included mapping presets provide quick integration with Mixamo, Mocap Online, and Unreal Engine 5 mannequins.