Bot a Day: Daily Drawings

And the last of the three Monsterbots is Doublecross (who would later be named the much better Twinferno).  He turns into a double-headed dragon with a buzzing buzzsaw jutting from his breastbone. In robot mode, the dragon heads become his hands. Though the toy had sparking effects, the sparks did not shoot out of the dragon's mouths. Because that would be way too cool. He was available in 1987. 

From 1987, next Monsterbot. This is Grotusque, who turns into a gargoyle / winged tiger creature. 

From the gimmick-laden 1987 assortment comes Repugnus, the first of three Monsterbots. The Monsterbots were a team of Autobots that turned into fanciful monsters, each having some sort of "fire-breathing" sparking action. Repugnus turns into some sort of insectoid monster.