Miles "Tails" Prower (also known as Tails) is a young two-tailed fox and the deuteragonist in the Sonic the Hedgehog video game series. He is Sonic the Hedgehog's sidekick and best friend.
Appearance in the Movie
Although Tails doesn't make an appearance in Wreck-It Ralph, he appears in a caricatured illustration in the hallway of Tapper's alongside several other video game characters.
Tails is also present in a conceptual artwork of Tapper's, standing next to Chun-Li. This may imply that Tails was at some point meant to crop up in the film.
Tails on the arcade cabinet.
Concept art where Tails can be seen next to Chun-Li