In March 2013 probably
Chat with our AI personalities
according to the newgrounds trailer it is coming march 2013.
Where still on eps 8! epsode 9 is next.
I donno why was Alvin-Earthworm is up to. Maybe this Halloween, this Thanksgiving, or this Christmas. But we'll see.
As Sonic Underground was made during the time of 2D Sonic games, his age was probably around 9 as that was his age at the time within the games.On Sonic wiki it says that he is 17 years old.
Sorry, Sonic is and always has been 15 years old. It says so in the Sonic heroes manual.