I Want Everyone To Know That These Things Happened In Transformers

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Megatron ate people multiple times


(Sources: Generations Selects Special, Fight! Super Robot Lifeform Transformers: The Battlestars, Transformers vs. GI Joe)

I don't even really know where to start talking about this. Can we agree that this is insane? Like just the whole idea that it is CANON in MULTIPLE COMICS that Megatron enjoys eating humans. I don't know. I think this should show up in more of the mainstream Transformers fiction I think "Megatron eats people" should be a defining aspect of his character. I can't go into more detail about this I plead the fifth.
Honorable mention: the episode "Microbots" from G1 in which the Autobots shrink down and go inside his body.

Extreme amounts of robot hypno in G1


There are just a lot of episode plotlines in G1 where characters are mind controlled or have their memories altered. Usually it's Megatron doing it but sometimes it's the Insecticons doing it. I don't have like a comprehensive list of the times that this happened but:

Megatron took over a city and subjugated all the humans


The plot of the 2 part G1 episode "Megatron's Master Plan" is that Megatron gets jealous seeing the Autobots get an "Autobot Day" parade so he convinces a rich guy who wants to be mayor that the Decepticons are actually the good guys and he should frame the Autobots for crimes to get them kicked off the planet, and then once they do get kicked off the planet (and after the Decepticons have their own parade) Megatron captures and enslaves all the humans in the city, puts handcuffs on them, orders them to labor for him producing energon from all possible energy sources, and renames the city "Megatronia 1". He also shoves the guy he manipulated to the ground and orders him to "grovel for his amusement". I don't know if I'm really getting across how insane this was to watch and how the atmosphere of it was so please just go watch it. It reminds me a lot of All Hail Megatron except they enslave the humans instead of just blowing everything up.