A while back I posted this drawing here: trice01.deviantart.com/art/Twi…  
In it I depicted a Transformer based on the My Little Pony character, Twilight Sparkle. I had even created a faction symbol to go along with it. After that I hadn’t given the design too much thought, and then TeePublic had a period where they were featuring unicorn designs. So I brushed off the old piece and created the logos you see here.  
We have the Heroic Canterbots and the Evil Chrysacons based on Princess Celestia and Queen Chrysalis.  
It was neat trying to create those but man the 3D extrusion I did by hand was a pain. I tried to duplicate the effect seen on the original G1 Transformer logos, and found that they were not done the same way I was used to. So I had to reverse engineer the entire process which took some trial and error.