a Rhinox toy from American chain Checkers and its regional variant Rally's. (2000)
the McDonalds' toys of the Armada Autobots and Decepticons could combine into the "Mighty Robot" and the "Mighty Vehicle" respectively. (2002)
The RPMs Devastator Showdown track set fires the included car on a track to an area that releases a "wrecking ball" follow the car down the track. Yes, that means Devastator fires his testicles at you. (2009)
Optimus Prime dies after being randomly shot during a random battle on Earth. (1987)
Optimus Prime proudly declares that he and the Transformers come from America. (1985)
According to screenwriter Buzz Dixon, Optimus Prime was to have a cameo in the My Little Pony Movie. He was to be asked by one of the Ponies for aid only to disappoint them, leaving the Ponies to instead enlist the aid of a drunken Shipwreck from G.I. Joe. (1986)
Starscream fires his null-ray from his finger. (1985)
Gold Plastic Syndrome was a condition that affected many TF toys containing gold and/or metallic swirls in plastic over the years, where its plastic decomposes and becoming brittle to the point of shattering or crumbling under minimal-stress conditions. (1988-2015)
Takara releases the 'Smallest Transforming Transformers' line, consisting of downsized G1 toys. (2003)
an Electronic Voice Synthesizer in the likeness of Ultra Magnus, that allows children to 'talk like a robot' by mouthing words into it. Since it can create synthesized speech from mouth movements without sound, the toy has been used as a replacement for electrolarynx devices.
an issue of IDW's RID comic makes Steve The Vehicon an official character. (2015)
the Scout class figures from the Cyberverse line all have half-transformed alt modes, for some reason. (2018)
the "Cybertronian Warriors" pack released in the DOTM line references an incident that happened on the set of the movie, where the Bumblebee prop car collided with a Metropolitan Police Department SUV. (2011)
Astrotrain's train army. (1985)
Starscream, Blitzwing and Astrotrain carve their faces into a rockface.
Masterpiece Wheeljack's face can be removed to reveal a face based on Animated Wheeljack beneath. (2014)
Hot Shot and Downshift drive through space. (2004)
the Energon cartoon's wonderful CGI. (2004)
concept art for a Decepticon for Transformers: Hero. (2004) While he looks a LOT like IDW's Tarn, the similarities between the two are apparently complete coincidence, according to Alex Milne. (2019)
red herrings sprinkled throughout the run of More Than Meets The Eye suggested that Tarn was actually Optimus' old friend Roller. It was all misdirection in the end, with Roller being revealed to still be alive one page before Tarn's true identity was revealed. (2012-2016)
Michael Bay's real-life dogs, Mason and Bonecrusher, cameo in the Transformers movies. (2007-2011)
the actress who plays the girl with the pony in the 2007 TF movie won the pony prop from the movie in an auction, and still owns it to this day. (2007- )
Frank Welker provided the voice of Soundwave for not just the English, but also the European French, Castilian Spanish and Italian versions of the Revenge Of The Fallen movie. (2009)
concept art of Daytrader from The Last Knight gave him a head based directly on his actor, Steve Buscemi. (2017)
Dickbot The Blender Guy. (2009)