For another Sonic Character, Trying to talk about something else other than Shadow for this one
-Silver would be Awesome, but I do wonder how he'd be balance in a game where Pushing people off the map is the goal, considering his powers
-Infinite Very Much Intrigues me in a hypotehtical Smash Moveset. Reality Warping with the Phantom Ruby could introduce some interesting gameplay elements not just to Smash, but also to Fighting games in General. Plus I do like Infinite (Unpopular Opinion: But I actually like his Backstory)
-Chaos 0 would pretty much be the Venom of Smash, And I Like Venom, so...
-Knuckles would be alot of Punch, but Digging under the ground and Summoning Meteors are interesting moves. It would also be cool to have Gliding come back for a character Properly balanced around it
-Blaze is Cool as a character, But very underused unfortunately. She'll have alot of Flaming moves, and can summon Fire Pillars, along with Gliding with her shoes and boosting, some stuff there
-Metal Sonic would be Awesome. He has alot of material, like Laser beams, some Electric type attacks, Copying moves, Maybe even Transformtions (though I believe they don't want to use Metal Overlord anymore), he can even do the Psycho Crusher. And he has Big, Metal, Claws
-Mephiles would be that unnerving character that would use Shadow Clones like Noob Saibot. Plus he killed Sonic, he's a great Villain, and His voice is Delicious
-Eggman I'm not sure how he'd work because he has so Many Mechs, and alot of them are bigger than Ridley. He has much potential and Personality
-Zavok is Very Meh, but he could be the Captain Commando with the Deadly Six, Except even then I don't think the rest of the Deadly Six have any cool Powers from what I've seen, so still eh
-Amy would be very Graceful, while at the Same time very Aggressive with her Hammer usage.
-Omega is Just cool, enough said
-Big the Cat is already in the game, and he even took up Wrestling and lost some weight, and it also Seems Blaze has been giving him lessons.
-Tails has potential with the Gadgets, and maybe he could be an Air Grappler with his Aerial Prowess . despite that, I actually not really into Tails like that. He doesn't have as much Swag has the other characters, he's still cool though,
Honestly I'd be pretty cool with any Sonic Character, except for Zavok, and would be slightly dissapointed by Tails, but yes. However I want Shadow above all else. What needs to happen is that Sonic needs another Official Fighting game. Something like DB FighterZ, but with More Single Player, Better A.I, Rollback Netcode, and maybe some unlockabale Auto Combos for the Casual Players. maybe even a Smash style Special system