The last two years of the original toyline was filled with Micromasters, since their affordability and tiny size encouraged collecting. The bulk of the Micromasters were available in "Patrols," four packs of robots united by a theme. For the 1989 Micromaster Patrols, I've split them into pairs. So here's the first half of the Battle Patrol, a military themed squad of Autobots. In this drawing is Sidetrack (on the left), who turns into a Roland anti-aircraft missile launcher atop a Marder IFV tank body. To the right is Sunrunner, who turns into an E-2C Hawkeye radar plane. These were available in 1989 and this drawing is from 2017. These toys were released in 1990 in Japan with the same names, but are intended to be different characters. I drew them in 2019: Sidetrack and Sunrunner.
The combined form of the Universe Micromaster Aerialbots is Superion, an amalgamation of six robots plus their pack-in accessories that serve as connectors, head, and extremities of the gestalt warrior. While in Japan, the original source of the design ( Sixwing , 1992) was available in a collected set, this combiner needed to be purchased one bot at a time in the 2007 Universe release.