Bot a Day: Daily Drawings

The last and largest of the Autobot Micromaster Bases from its launch year is Countdown, who turns into a moon rover. His launch base is a rather elaborate playset that turns from a rocket launchpad to a battle station loaded with play features. All the Micromaster Bases can connect to one another, allowing for the creation of a sprawling Micromaster-scaled city. Countdown was released in 1989. It marks the last drawing of the 1989 toys, meaning the final year of Generation One toys starts with tomorrow's drawing.

Groundshaker is an Autobot Micromaster that turns into a stealth jet, but the source of his name comes from the armored fighting vehicle he pilots while in robot mode. The ATV transforms into an artillery emplacement / base, complete with a landing pad for his jet mode. He was available in 1989. 

Skyhopper was one of several Micromaster Bases available in 1989, the inaugural year of the Micromaster brand. The Bases differ from the Stations in that they are all vehicles that the Micromaster can "drive" in robot mode, which then turns into some sort of battle station or outpost. In this case, Decepticon Skyhopper can fly in an attack helicopter that turns into a base. Skyhopper himself turns into Dassault Rafale fighter jet.