Shadow has two lines in the entirety of Worlds Unite, this is because Team Dark is killed off early into the story and then makes an arrogant response to Sonic about his well-being after he called him to make sure he wasn't still dead after reverting the worlds.
Also I thought it was worth noting Sigma gets bodied with hardly any contest in just a couple of pages because they set the final battle on the last issue which normally doesn't sound like a bad idea but then there's a side plot with Eggman and Wily...(1/4)
...where they just might be able to salvage everything and come out on top, but then that gets shafted by Xander Payne, which may or may not have reality warping consequences (pretty minor actually), which in itself takes multiple pages. (2/4)
And THEN you have to fit the resolutions for all of the characters involved, Sonic and Mega Man anyway, the Sega/Capcom characters aren't heard from again because they absolutely do not have the page space for that lmfao. They should not have been introduced in Act 3. (3/4)
Tikhaos is a mutated fusion of Tikal and Chaos, appearing in Sonic Universe's "30 Years Later" story, in which she was freed by King Shadow and overfed Chaos energy, resulting in her Perfect transformation.
Amy Rose seems to be the only character in the main Sonic the Hedgehog cast who can handle a casual punch from Knuckles.
Scott Pilgrim's high school band "Sonic & Knuckles" is a very subtle reference to the 1994 Sega Genesis game Sonic & Knuckles.
Sonic the Hedgehog does not know what hedgehogs look like.
Whisper the Wolf's design began with an in-game custom character in Sonic Forces. From there, she would gradually evolve into her final look.
Tails is very discontent with the fact that Eggman has settled on making Tails Doll rather than a Metal Tails. Moreover, this suggests that he finds Metal Sonic and Knuckles to be particularly cool.
When robots or lackeys fail, Eggman uses his built-in command grab
In 2015, it was revealed that Ian Flynn, Tracey Yardley!, and Ben Bates of Archie Sonic the Hedgehog fame had pitched a line of Super Mario comics to Nintendo. It was ultimately rejected. Allegedly, Mario was also intended to cross over with Sonic and Mega Man in comic form.
Knuckles the Echidna's father dies of pancreatic cancer in the Archie Comics.