the character Trent from the 2007 TF movie also appears in the 2009 Friday The 13th movie, played by the same actor; implying that the two movies might be set in the same universe. (2007)(2009)
Splatoon hosts a RID 2015-themed event.
Andy Schmidt uses Don Figueroa's Stealth Bomber Megatron design in the pages of IDW's Transformers, without telling or paying him. (2011) Hasbro then makes the design into a toy, also without credit or compensation. (2014)
Hasbro names a Transformer 'Big Daddy' (1990)
Grimlock saves the universe by flipping a single switch. (1986)
Waspinator tells Inferno and Quickstrike to kiss his ass. (1999)
Netflix asks viewers to consider what would happen if Optimus Prime and Megatron worked together to open an Italian restaurant. (2021) twitter.com/NetflixGeeked/…
Data miners hacking Genshin Impact find a 3D model of DOTM Shockwave hidden in the game's files. (2022)
The Transformers Hall Of Fame has fans vote for a character they want to see inducted in. Fans jokingly begin rallying behind BW Dinobot, no one seriously believing a BW character would beat the G1 guys. Dinobot proceeded to win the fan vote. (2010)
The Bumblebee Twitter account throws a fit over Sonic. (2022) twitter.com/bumblebeemovie…
Killbison yells a bunch of gibberish. (1989)
Windblade is unimpressed by Starscream's dating profile. (2017)
Wheelie looks up Arcee's skirt. (2017)
an amnesiac Megatron comes into the ownership of a small-time gangster, who uses his gun mode to go on a crime spree. (1986)
Grimlock sentences a bunch of human children to DEATH. (1987)
Skids REALLY enjoys getting washed. (1986)
Run-Over, from the Beast Wars Universe text story 'Derailment', speaks entirely in quotes from The Simpsons. (2016)
the rushed broadcast schedule of Armada results in several episodes being aired with unfinished animation, some of which was eventually cleaned up for the Japanese "Micron Legend" airing. (2002/2003) (here's the most prominent example of this; from the episode 'Linkup')
Starscream Keroro ver, a redeco of Movie Legends Starscream resembling, Keroro (Sgt Frog), is released to promote a Keroro x Transformers one-shot manga.
the Autobots get turned into humans after running afoul of a suspiciously-familiar-looking human villain. (1986)
in "Megatron's Master Plan", Trailbreaker singlehandedly saves the entire Autobot army from dying horribly with his forcefield powers. Trailbreaker doesn't have a single line of dialogue in this episode. (1985)
IDW publishes an entire storyline making fun of how Cliffjumper looks like Bumblebee. (2020)
Overhaul shoots a lot of white liquid from his groin. (2005)
Galvatron is killed by the power of Friendship. (1987)