Tails
Tails is a boy, not a girl, so no he's not his sister :P He's more like his surrogate brother.
Black is Shadow, Red might be Knuckles, Brown is Tails, Blue is Sonic
Sonic`s best friend is Tails.But in the Sonic The Hedgehog and the Adventures Of Sonic The HedgehogIt was both Sally and Tails.Knuckles, and Tails
The Sonics was created in 1960.
The Sonics ended in 1968.
they changes colors
Yes. He pinned shadow to sonics bed who'll sonic was shopping tails was having sex with shadow when sonic came back he shot tails in the head with a bazooka decapitating tails shadow explained what chapped sonic couldn't stay mad are him and for gave him shadow was so happy then he took sonic to his bed then they had sex and had a nice sleep
Bristol Sonics was created in 2002.
Here Are The Sonics was created in 1965.
Some one probably has a pet fox named Tails but if you are talking about the video game Tails then I do not think he exists.
Beacuse ppeople want them to be differnt.