the existence of the Prime First Edition toyline, which was then followed by the RID mainline, meant that many characters had two different toy versions of themselves available in the exact same scale and pricepoint.
G1 Arcee, and female Transformers in general, owe their entire existence to 1986 movie writer Ron Friedman having a daughter who loved Transformers. (1985)
the Scout class figures from the Cyberverse line all have half-transformed alt modes, for some reason. (2018)
a cute gag that was sadly lost in the Cybertron dubbed version of this scene is the use of the G1 transformation sound effect for Signal Lancer here: twitter.com/tfwiki/status/…
the Predacons attempt to dress up as Autobots to confuse the Decepticons, only to end up all dressing as Optimus Prime. (2001)
for the 2007 Movie's "Premium Edition" line of retooled figure, the Leader Class Optimus was given a new headsculpt with longer antennae. Upon release, it was nicknamed "Bunny-ear Prime" by the fandom.
the cover of an issue of Venus magazine, the only magazine for Decepti-femmes! (2010)
Hot Toys Optimus Prime comes with bits of Starscream, for some reason. (2015)
Torque and Falcatron, original FOC Autobots created via a promotion by Ford Australia and High Moon Studios, asking Australian fans to suggest ideas for the characters' designs. (2012)
ROTF Powerhead Walkie Talkies. (2009)
the robot mode of the Kingdom Ark toy is designed to resemble The Last Autobot from the Marvel comic. (2021)
Soundblaster's tragic backstory. (2021)
Dion gets shot and killed, but unlike Orion Pax and Ariel, is never rebuilt, causing fans to endlessly speculate as to whether he was ever rebuilt into anyone. (1985)
Starscream admits that he is stupid. (1985)
in the Headmasters anime, Cybertron blows up, rendering Optimus Prime's death completely pointless. (He had sacrificed himself to stabilize Vector Sigma several episodes prior) (1987)
the crew behind Beast Wars really wanted Frank Welker to reprise his role as G1 Megatron for his brief cameo in "The Agenda", but scheduling conflicts resulted in Garry Chalk (ironically) voicing Megatron instead. (1998)
the Legends manga gives Trypticon a new mode, based on Shin Godzilla's "Kamata-kun" form. (2017)
the 2001 RID cartoon has the distinction of being the only western Transformers cartoon that Hasbro does not have full ownership of, due to it currently being owned by Disney via their purchase of Saban.
Galvatron stares down his own cannon barrel. (1987)
the number of weapons AOE Voyager Hound and Generations Voyager Roadbuster came with. (2014)
Marty Isenberg is convinced to allow the release of the two lost Animated shorts after seeing a post from this account. (2022) @KeyanCarlile twitter.com/TF_Moments/sta…
The Allspark Almanac 2 heavily implies that Armada Starscream once visited the Animated universe. (2010)
in the Legends manga, Whirl befriends a young girl. her design is based on IDW Whirl's holomatter avatar, while her colours seem to be based on...Hatsune Miku. (2014)
This VF-1EX Mirage Farina Genus machine, from Episode 3 of "Macross Delta" resembles the color scheme of the G1 Jetfire toy. (2006)