Not sure what a mini con is.
It's based on an idea I read about that is in the Japanese timeline of G1. Not sure when the g1 japanese timeline splits off from the us g1, I'd guess either after season 2, but before the movie or before the season 4 at the latest.
In my character's case a micromaster is a human size robot who can transform into a normal size vehicle. Though I may take an idea from the transformer: masterforce series but instead of looking human when in his pretender shell he has a human size autobot transformer body, far more fuel efficient then his regular autobot size one, and he gets to hang out with humans and go places with Jason also. I may add in like the pretenders have, a full normal size body, and a vehicle form they can change into. And maybe another form to make him maybe a triple or quad changer. Probably a triple since having 1 form that can go between 2 sizes counts as 1 form I think since in season 2 Perceptor can be either a small microscope a human can use or a larger one an autobot can use and he's not considered a triple changer.
A pretender is a transformer (only seen I think in transformers masterforce) they have a human pretender shell, so then can look and effectively are human, but they have a normal full size transformer body and a vehicle form.
Metalhawk is one such, the leader in the transformers masterforce series & you can see his transformation sequence:
http://www.youtube.com/watch?v=Z5g31OuseRUSorry if it's all confusing.
I forgot his name. I think it was Longstride, since he likes traveling at times, and when with jason (maybe one of his designers) he can travel a long ways.