I just realized that the trivia didn't mention a reference of Sonic Boom (Eggheads) that was appear in Team Sonic Racing cutscene.
Amy Rose gave an example to Big the Cat to not accept the unknown stranger instantly they appear, even if they're nice.
Amy Rose said that if Eggman gave her a bag of cookies, she still wouldn't eating them even if she took them. That was referring to "Eggheads", where Eggman made few cookies and delivered it to Sonic and his friends. However, all but Sonic ate the cookies and gained Eggman's evil personality in that way.
Wasn't this supposed to be mentioned in the trivia section of Team Sonic Racing? Had to ask before I could go ahead and put that in.