Download the R15IK Blender archive and open it, you will see a Roblox Rig and a bunch of others things. Must be something like this Now, let's see how to animate with the Rig.

So before it gets disappeared, go ahead and try out the R6 rig if you haven’t already. How to Enable R6 Avatar in Roblox To enable and switch to R6 Avatar in Roblox you’ll have to go to the Scale ...