>>5748978AFAIK, there's only two options, Fansproject's Smart Robin and Toy World's Brainwave.
Smart Robin has a very cool transformation, but is a bit small (about deluxe sized) for his price. Pretty good articulation, however his headmaster is based on the Headmasters cartoon, so it has a face instead of a faceplate. FP did a fan club release of the headmaster with the faceplate, so that's probably a bitch to get.
Toy World's Brainwave is big and chunky. Personally, I don't think it looks that good.
Here's a comparison between the two
https://www.youtube.com/watch?v=FTCAf7accUcPersonally, I got the recolor of Smart Robin, Combes Robin, who is pretty cool, but I did feel let down by the size.
I really liked Fan's Project's version of Mindwipe, Sigma L. Good size, good articulation, double shotguns, simple but good transformation.