I've never commented on this thread before? "I don't believe this!" With Tails and Knuckles as Mii costumes and Knuckles and Shadow as ATs, it looks increasingly likely that Robotnik is Sonic fan's last best shot to get another representative in Smash.
Robotnik could be a spectacular fighter, and one of the best pitches for him came from this video:
Just thinking about his potential reveal trailer gets me really hoping he's in. Something like:
It should take place at a Sonic event hosted by or attended by Sega. The reveal is animation-based, drawn and spearheaded by Tyson Hesse who is largely responsible for the intro to Sonic Mania, the Sonic Mania Adventures and other recent cartoon shorts, and the re-design/fix of movie Sonic.
"Modern" Sonic is running around a beach-themed area. It looks like it's from Sonic Adventure. The fans' hype intensities--could this be linked to the rumored Sonic Adventure remake?
Sonic runs past the boardwalk/pier as killer whales jumps over. It is lighthearted romp. Tails flies in and beams at Sonic; Sonic smirks and speeds off, almost daring Tails to catch up.
Sonic gets too close to the water's edge, and upon taking a sharp turn, sprays water onto a now visibly-agitated Knuckles, who was sunbathing on a beach chair. Sonic is oblivious to this and continues running, closing his eyes for a moment in sheer self-satifact--
BAM! Stars. Birds. Blackness. Sonic hit something. Or maybe something hit Sonic. Knuckles?
Sonic, still groggy, turns his attention upwards. You see a close-up of the side of his face. Almost a mirror image of the Inkling in her reveal trailer. A fireball is reflected in Sonic's eye. No...not a fireball...it gets closer, bigger--a checkered wrecking ball, reflected off the sun. Sonic leaps out of the way at the last second.
Sonic looks up. A look of anger and surprise. Tails flies over next to him. Followed by Knuckles.
A silhouette object in the sky reveals itself to be Robotnik in his Egg-O-Matic flying vehicle. He pulls a Smash envelope from his breast pocket and laughs to convey he came across it from "less than legitimate" means.
He winds up his vehicle and Smashes the wrecking ball again with the splash page of "EGGMAN...CRACKS HIS WAY IN" or something like that.
And of course at some point during the conclusion of the gameplay segment, Sonic along with the Tails and Knuckles Mii fighters are teaming up against him.