I was watching the clip of Starscream's death in TF:TM and when Rumble asked what's his name, Galvatron didn't mentioned he's Megatron.

So, did he ever told them he's Megatron or do they think he's a different guy?

 

They did. It's mentioned in an episode of Season 3, "I thought they were the same guy." I forget which episode, but I'm sure someone will hop in here and name it.

But really, Starscream figured it out immediately during the movie. They all know, but they're too afraid of him not to humor the name change  

 

This

 

DeadEnd said it, in Five Faces of Darkness.

 

I think the better question is did they ever learn who Cyclonus was?

 

I don't think anyone cared to ask.

 

I'm not even sure Cyclonus knows.

 

Cyclonus was always cyclonus. Galvatron 's minions are not like Megatron having a former self.

 

Yeah he's reformatted from older characters but still he's a character of his own, not Skywarp or Bombshell, that's why writers usually don't care about who's Cyclonus.

 

Well, Scourge and Cyclonus (and their associated clones) were created on screen from Megatron's fallen minions, so people have long assumed they're "reformatted" a la Galvatron.

But there's a line in the movie that suggests otherwise. Unicron says to Megatron "I will provide you with a new body and new troops to command." He doesn't say he'll provide new bodies to Megatron and his troops. He says he'll provide new troops. So it's entirely plausible that Megatron's dead and half-dead underlings were merely used as raw physical materials. Kinda gruesome.  

 

Exactly

 

I know he was reformatted from old decepticons but what I meant was that he was an entity of his own and not "reformatted Bombshock or Skywarp." (not literally.)

 

Galvatron effectively told them by answering Starscream with a death blow.
Then in 5 Faces of Darkness part 1, Astrotrain says "Well, they were the same guy."

Funnily, the Autobots knew even clearer that Galvatron used to be Megatron.
Inside Unicron when Galvatron is about to kill HotRod, he refers to killing Prime and Magnus (who he thought he killed).

Then in The Return of Optimus Prime, after the Autobots team up with Galvatron, Optimus even tells him,
"that's because I know you too well, Galvatron", even though it was his 3rd time meeting him in his new identity. (the 1st 2 times they hardly spent any time together.)

 

actually it was astrotrain

 

Astrotrain surely knew the thing (I believe this)or at least suspected.

About Cyclonus...for a long time I thought that he was Skywarp and for this reason I was a little disappointed that in season 3 he(and same thing for Scourge..) never spoke about his previous life

In times in which I believed this ,during "Starscream's ghost"in Deceptycon crypt,just as Octane spoke to Thundercracker statue,I'd loved so much seeing Cyclonus ,during his search for the traitor,finding Skywarp statue and observing it in silence and respect for few istants...as a tribute to his old life.

Other funny thing:when in the movie Galvatron comments about bad comedy ,it seemed to me that Cyclonus had the face of something who was impatient to do bad things...not only for his mighty leader Galvatron but also as his personal revenge  for being jettisoned from a shuttle... 
....only very later I found the truth ,Cyclonus wasn't Skywarp as soul/spark ,he was completely new.

So at the end:certainly a lot of Decepticons believed in Galvatron being Megatron(that certainly still keeps Megatron's memories)and a lot of the other ones were just very,very suspicious about the thing,certainly only few Decepticons could have believe he wasn't Megatron.

for Cyclonus he's certainly a new character ,seems a lot smarter than Skywarp and he's very competent.I'm sorry that this confirms that Skywap was dead,but at least, was born a new character with a memorable attitude.

 

Galvatron makes it clear who he is when he blows Starscream away. I always took Rumble's question as a way of asking what to call him, now.

 

This is all news to me! Is it just personal preference and fan supposition to assume that Cyclonus and Scourge were completely new characters, or is there hard canonical evidence?

In the UK G1 comics, it's definitely stated that Cyclonus had a previous life, and in James Roberts' Eugenesis it's a major plot point that Scourge has Thundercracker's memories.

Cheers!

 

Did Deadend ask a question about it right before then? Or am I totally mis-remembering the scene?

 

In Scourge's tech spec, it refers to him being made from "Decepticon wreckage." Cyclonus' doesn't mention this, but his bio on Heroes of Cybertron tech spec says that he's formed from the remnants of damaged Decepticons. So, whether you want to go by this or the UK comic is up to you, but Eugenesis is just fanfiction, so it doesn't have any kind of canon status.

 

Having a completely different personality doesn't count as hard canonical evidence? Seriously, no way did those patsies suddenly just decide they were Decepticon alphas.

Comics don't even factor into the equation, because comic Scourge and Cyclonus are created out of random extras.