With all the backlash from the upcoming Mech Tech gimmick, it got me thinking about the gimmicks of old and how under-appreciated some of them were in retropect. Though some people though Mech Alive was useless, it was really kind of neat and did not hinder too many figures. Yet it seems to be gold in comparison to the Mech Tech idea. So, I pose this question to everyone: What is your favorite Toy Line gimmick, from any line/generation? One stipulation: You must choose one. Even if you think all gimmicks are turds, pick the shiniest turd of the bunch. Go.