the Transformers take part in a fighting tournament hosted by robot catgirls. (2004)
Primus uses Cybertron's moons to clobber Starscream. (2005)
despite being used only once in the G1 cartoon, G1 Optimus and Megatron's energy axe and mace accessories are very popular pack-in weapons, especially in Japanese figures. This can be attributed to how that scene was prominently featured in the JPN opening for the cartoon.
Galvatron quotes the '86 movie, and Optimus isn't having any of it. (2016) (a meta-jab at how often newer Transformers media often reference or directly quote the movie)
The majority of Age of Extinction toys and promo images for Optimus are based on a preliminary design for the character, not used in the final film. The differences are most noticeable on the chest, although there are minor design variations across the entire body. (2014)
in the Japanese dub of Prime, Shockwave says "Shock" a shockingly whole lot. (2012)
the Dinobots and Autobots play football. (1985)
an Animated version of RID Optimus Prime/Fire Convoy cameos in one of the Animated storybooks. (2008)
Loose Deuce, the BotBot who turns into a pile of poop. (2022)
Optimus launches the Matrix from his chest to clobber Megatron. (1990)
centuries after the end of Beast Machines, Cheetor ascends and evolves to become the spiritual leader of Cybertron, Alpha Trizer. (2016)
Energon Cruellock's dino mode is designed to resemble the 1998 movie version of Godzilla. Signal Flare from the same line is designed to resemble the Maser tanks from the Japanese Godzilla movies. (2004)
Chris Latta's Starscream voice noticeably takes on a much higher pitch over the course of the series. (1984-1985)
prototypes for the unmade Animated Marauder Megatron and Hot Shot toys. (2010)
a billboard for Transformers: The Movie appears in the G1 episode "Make Tracks" (1985)
Peter Cullen was initially unavailable during the recording of the G1 episode "Countdown To Extinction". As such, Chris Latta stood in as the voice of Optimus Prime, with Cullen dubbing over the lines later. (1984)
the majority of voices in the Cyber Missions webseries was done by a mysterious, unknown man named Bronco D Jackson. (2010)
TFNation 2019 held a live reading of the proposed premiere of Animated Season 4, "Trial Of Megatron", with most of the show's voice cast reprising their roles. Artist Eric Siebenaler also drew concept art of new characters Uplink and Trac-Tor, who would have appeared in the ep.
Megatron expresses distress over the Earth being set to explode in one second, but takes considerably longer to get out of dodge. (1985)
the Titan Master of Titans Return Sixshot is designed to resemble Jack, a guy who Sixshot killed in the Headmasters anime. (2016)
the French dub of the 1986 movie makes Starscream and Shrapnel female.
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)
30 years later, the unproduced cloud-deco Seeker from G2 is finally given a name in Legacy. (2023)
the commercial for the Armada Unicron toy uses footage from the 1986 movie instead of Armada. (2003)
G2 commercial for Combat Hero Optimus and Megatron. This commercial is notable for actually having Peter Cullen as the voice of Optimus Prime, his final turn as the character until the 2007 movie. (1994)