Lugnet gets kicked in the ass. (2008)
the Decepticon Headmasters attempt to assert their dominance with their "Trio Formation". (1987)
Blurr's death in the IDW Unicron comic pays homage to the Flash's death in Crisis On Infinite Earths. (2018)
Ultra Magnus is rebuilt into the gigantic "Maximus Ambus" (2016)
to prove that a Trypticon toy was feasible at the Titan pricepoint, a Titan Fortress Maximus prototype was disassembled and reassembled into the general shape of a dinosaur. (2016)
several TF toys over the course of the franchise's history have been mistaken for being retools of past figures due to design similarities, when they are in fact new molds that merely share engineering cues.
Slag was built without emotional dampers to keep his violent nature in check, so once every 4 million years he'd go berserk On one such occasion, the other Dinobots attempted to cover for him while Optimus was inspecting their base. (1990)
Grimlock takes flight using his giant new swords. (2021)
Megatron is turned into a Pikachu. (2005)
in the Legends manga, a legion of Kickbacks do some unspeakable things. (2017)
Hot Rod is magenta in the 1986 movie because an early prototype for his toy was that colour. the final G1 Hot Rod toy was red, and to this day almost every toy released of him by Hasbro is red. (Takara meanwhile, are usually the ones who properly colour him magenta)
Drift's Deadlock design in Cyberverse was based on a piece of fan art from Guido Guidi, which was itself based on G1 Springer. (Springer being a car/helicopter triple changer, like the live-action Drift) (2020)
Shattered Glass Drift, the Mech With A Mouth. (2012)
In RID 2001, Side Burn has an obsession with red sports cars...which makes his powered-up form being red very questionable....(2001)
Animated Jetfire and Jetstorm's fire/wind theme has its roots in some of the earliest concepts done by artist Sean Galloway, who drew designs for a pair of "fire and wind" robots long before the "final" Derrick Wyatt-designed characters were shown. (2007)
Animated Safeguard is the TF franchise's only symmetrical combiner, paying direct homage to King of Braves GaoGaiGar. (2008)
RID Landfill (Car Robots Build King) has a unique combination system, where he is formed from four bots, with one forming the arms, allowing for multiple different configurations. (2001)
TVTropes defines the literary trope of the scheming second-in-command as "The Starscream".
Clear Out, an Autobot who appears in the Wings Universe comic, is designed to resemble the Red Dragon Thunderzord from Mighty Morphin' Power Rangers. (2010)
Japanese voice actor Hiroki Takahashi voiced Starscream in Beast Wars II, and Optimus Prime in Animated's Japanese dub. Reportedly, while voice recording for that series, his body would still react involuntarily to the mention of Starscream's name. (2010)
Fortress Maximus tears his own head off to prove what a chill, peaceful guy he is. (1987)
artists Art Marcum and Matt Holloway pitched a WW2-era TF movie spinoff called Operation Skyfire, and drew lots of concept art for it. The plot involves Skyfire teaming up with soldiers to deal with Nazi Pretenders trying to un-freeze Megatron during the Pacific War. (2014-2016)
the CGI model of Revenge Of The Fallen Devastator was so big and complex he caused ILM's hardware to explode. (2008)
Sky-Byte's ingenious disguise. (2001)
a flashback in the Cybertron episode "Balance" depicts four "wise elders" who are based on G1 Optimus Prime, Rodimus Prime, Ultra Magnus and Jazz. (Jazz appears to have door wings ala his G1 toy, that he didn't have in the cartoon) (2005)