Having a total of 104 episodes, Rescue Bots is the longest-running Transformers show of all time. (2012-2016)
During the first draft of the Prime episode 'Stronger, Faster' there was a line where Ratchet implies Elita One had died during the war and blames Optimus for it, leading Prime to punch Ratchet. The scene was cut as the story editor didn't want Optimus to lose his cool. (2011)
Crumplezone rides Ransack. (2005)
Cliffjumper pulls out a giant bazooka that's twice his size out of nowhere. (1984)
lack of time and budget to design new robot mode models means that in the G1 cartoon, all the Transformers sport parts from their Earth vehicle modes on Cybertron, millions of years before they get there. (1984)
In Rescue Bots Academy, Whirl's locker has a drawing of her with another, IDW-inspired Whirl, perhaps suggesting that the two might be related somehow. (2020)
Scott McNeil voiced Jetfire in Armada and Energon, but was replaced by Brian Dummond in Cybertron, apparently due to the producers wanting an Australian-sounding Jetfire. Ironically, Scott McNeil is Australian while Brian Dummond is not. (2005)
the Maximals choose to bring Megatron back to Cybertron by strapping him to the outside of their ship, inadvertently causing them a LOT of problems later on. (1999)
in Prime Season 2, Megatron’s jet mode still has his fusion cannon even though at that point he had it replaced with a new lower arm. (2012)
The design of Optimus Primal's bat form is an homage to Batman, whose action figure license was also held at the time by Kenner. His designer chose the black color scheme to redeco him into Onyx Primal, enhancing the mold's inherent resemblance to Batman. (1996)
Agent Fowler calls for Batman. (2012)
A Shockwave that transforms into a purple sports car is parked outside the Transformers Ride at Beijing's Universal Studios due to BMW's sponsorship. It periodically plays recorded lines, begging the tourists to free him from N.E.S.T's capture. (2021- )
Shockwave's inclusion in Animated arose from a between-scenes conversation Corey Burton had with the production team, regarding how little the original Shockwave actually had to do in the G1 cartoon. (2008)
Hasbro slapped the name "Shockwave" onto a random Cybertron Minicon in order to claim it back after they had temporarily lost the trademark. While he may be the odd one out among them, every Shockwave released since has him to thank for keeping the name in circulation. (2005)
Before Dark of the Moon, Movie Shockwave put in his first appearance as the final boss of the 2007 movie's tie-in games.
Universal Studios Beijing has a cafe inspired by Swerve's bar from MTMTE. On display there are Swerve's My First Blaster, Tailgate's hoverboard, and Grimlock's crown.
Takara reboots Diaclone as its own toyline, complete with reimagined takes on Battle Convoy (who became Optimus Prime) and Powered Convoy (who became Ultra Magnus) (2016- )
Bob Budiansky was inspired by Star Trek when characterizing Shockwave, imagining him as an evil version of Spock. Meanwhile, Corey Burton based his performance as Shockwave in the G1 cartoon after David Warner's portrayal of Sark in Tron. (1984)
Tailgate saves the universe with a semicolon. (2014)
in the film "Boogie Nights", Mark Wahlberg's character sings The Touch, inadvertently foreshadowing his role in Transformers many years later. (1997)
Rattrap discusses a Cybertronian bar. (1998)
the Autobots disguise themselves as a giant buddha statue that fires missiles at the Predacons. (2001)
The RID 2001 Optimus Prime toy has a voice chip that says "Optimus Prime, Maximize!", likely a sign of how late in the design process the decision to move away from the Beast Era was. (2001) (clip from @Peaugh 's video)
For Revenge Of The Fallen, Stan Bush re-covered The Touch as "Sam's Theme", completely unsanctioned or unrequested by Hasbro or DreamWorks. (2009)
The first episode of Animated uses scenes from the G1 cartoon to represent archive footage of Cybertron during the war. (2007)