Yes, that's what the 2P mode is for.
no you can play as two players already
Tails is an NPC(non playable charater) unless you play two player mode.
mite be soon in a year or two
What level are you talking about?
In the Game SHADOW THE HEDGEHOG for PS2, Nintendo Gamecube and XBOX you can play as two parts, HERO OR DARK, when you play as DARK you get to defeat Sonic and take all the Emeralds, He doesn't attempt to shoot Sonic though.
Sadly, there is no co-op mode for this game. However, there is a 2P Battle mode, where the goal is just to kill the opponent.
yes it does
Sonic has ALOT of rivals. Two of the major ones I can think of are Dr.Eggman/ Dr.Robotnik and Shadow.
not right now in two years two known too him and two unknown to him 2 with princess Sonia and two unknown to him by rouge the bat
Yes, lots of times. It usually results in two things. The gamer getting irritated, especially with repeated occurrences, and Shadow saying "Dam*! Not here!"
No mephiles is not shadows twin in the game sonic the hedgehog 2006 he has two forms, an ice form and a smokey form he is released from the septer of darkness and takes shadow's shadow causing him to look like him. shadow and mephiles are enimes and have no relation or connection at all.
in a passable future if sonic the hedgehog marry s Amy rose then princess Sonia the hedgehog and shadow the hedgehog will get married thanks too the love of him and there two kids there son and there daughter but see thinks his other kids from rouge the bat of being his but is OK with it