What is the Divvy?
It’s a fuzz/ crunch pedal.
Is this the one that Rocktar Fuzz came from?
Yes. It’s not exactly the same, but it’s very close to it. The Rocktar was a simplified version of the Divvy. If the Rocktar sound is what you’re trying to recreate, just whack the voice switch to the right, and keep the volume around noonish.