Snapchat's get3DAvatar() gives you a rigged Bitmoji with no animations. Drop Mixamo FBX files here and you get one small .glb that bitmoji-anim.js plays on it in your PlayCanvas Web Lens. Everything runs in this page; no file leaves your computer.
animations.glb in your lens and call play()Clips from any Mixamo character work. Clips made on Snap's own rig fit the Bitmoji's proportions best: upload Snap's UploadToMixamo.fbx (Animating Bitmoji 3D) to Mixamo and pick your animations on it. Tick “In Place” on Mixamo for walks and runs your game moves itself.