Silver

Silver the Hedgehog is a recurring character from the  franchise. He is a fourteen-year-old hedgehog who comes from at least two-hundred years in the future. He commonly travels through time to assist Sonic and his friends. He has the ability to use psychokinesis which allows him to move objects with the power of his mind, but unlike most hedgehogs from the Sonic the Hedgehog series, he lacks super speed. He was originally voiced by, but is currently voiced by.

Super Smash Bros. Brawl
Silver the Hedgehog makes a cameo in Super Smash Bros. Brawl, running in the background of the Green Hill Zone stage along with Miles "Tails" Prower and Knuckles the Echidna. He also appears as a Trophy and a Sticker in the game.

Super Smash Bros. for Nintendo 3DS / Wii U
In Super Smash Bros. for Nintendo 3DS / Wii U, one of Sonic's alternate colors strongly resembles Silver. He makes an appearance as a collectible trophy as well in the Nintendo 3DS version. Silver also reprises his role in Super Smash Bros. for Nintendo 3DS, running in the background of Green Hill Zone along with Tails and Knuckles.

Super Smash Bros. Ultimate
In Super Smash Bros. Ultimate, Silver appears as a Spirit. Silver also reprises his role as a background character in Green Hill Zone.

Mario & Sonic at the Olympic Games
Silver was originally going to appear in Mario & Sonic at the Olympic Games, but was scrapped later on. A beta file of Silver was found on the European version and can be playable by hacking.

Mario & Sonic at the Olympic Winter Games
Silver appears in Mario & Sonic at the Olympic Winter Games as a Skill type playable character. His signature move for the Wii version is Levitate and Teleport Dash for the DS.

Mario & Sonic at the London 2012 Olympic Games
Silver makes his second playable appearance in the third installment of the Mario & Sonic series, Mario & Sonic at the London 2012 Olympic Games. He is a Skill type character in the Wii version and is part of the Challengers in the Nintendo 3DS version.

Mario & Sonic at the Sochi 2014 Olympic Winter Games
Silver reappears as a playable character in Mario & Sonic at the Sochi 2014 Olympic Winter Games. He is once again a Skill type character.

Mario & Sonic at the Rio 2016 Olympic Games
Silver reappears in Mario & Sonic at the Rio 2016 Olympic Games once again.

Mario & Sonic at the Olympic Winter Games
''Silver the Hedgehog is a new competitor for Team Sonic. Coming from the distant future with telekinetic abilities, Silver's signature moves are the Levitate ability on the Wii and DS and Teleport Dash ability on the DS. Expect the unexpected when this time-travelling hedgehog takes on the Olympic Winter Games.''

Official profile
Coming from the distant future with telekinetic abilities, expect the unexpected from Silver when this time-travelling hedgehog takes on the London Olympic Games!