|This character exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Sheldon initially invited Sonic himself to be the guest speaker at the convention, but when Sonic turned the offer down he invited Tails instead. Sheldon welcomed Tails when he arrived and introduced the fox to Posey, the resident Sonic expert. Sheldon was part of the crowd listening to Tails' (made up) story about his battle with Toadzilla, and later witnessed the arrival of Dr. Ivo Robotnik. Sheldon claimed that they didn't stand a chance against his gigantic robot, and ran to Tails' aid after Tails was knocked down by it. After Tails defeated Robotnik, Sheldon congratulated him and following him back to the convention.