What did Wade do?

Wade is more of a side character but he at least got Stone tied to a chair, so that's something

he also shot at Robotnik in the first movie when the town started to defend Tom and Sonic so that's also a plus

wade was a minor character not important to the plot, but in the spinoff show he will be more of a prominent character and probably get development judging by the sypnosis

Hopefully

Then there's Shadow......

well idk
we barely saw anything

Other than the mid-credits scene, hinting he was going to be in the third movie

yeah and also there were some other foreSHADOWing
fun fact the GUN commander is the same as in shadow the hedgehog 2005, and that might explain why he's against snonic and tails cuz they remind him of shadow (in the game, the commander sees shadow being made and gets traumatized as a kid and doesn't trust him because he saw shadow being created with alien blood)

Not to mention that he knew that it was called "Project Shadow" before the other GUN officer said anything

yeah

okay so my theory for shadow is that (and this is IF Jim Carrey isn't in the third film) Stone and Shadow will team up like he had with Robotnik, but Shadow will do something to betray Stone beyond what Eggman would've done, making him switch sides and join team Sonic

again, that's just a theory

A MOVIE THEORY

probably similar to SA2 (i'm hoping) because everytime in alternate media that shadow gets revealed in cryostatis etc, it follows the SA2 route

and also he revered eggman a lot, but before he couldn't do anything on his own
in the prequel comic, it's explained that he was hopeful and loyal and so he got hired at a coffee shop and was treated horribly but he kept a cool facade and ignored it. he killed off the other workers and took over, waiting for the doctor to return while running things.
also the name is a reference to robotniks mean bean machine lol

he never forgot eggman or lost hope

exactly