2 players @ the same time?

[bat]

Is it possible to have 2 players playing @ at the same time in a side-srolling game? (like Tails in SONIC THE HEDGEHOG):?:  

[durnurd]

There certainly is.  There's a demo already up:

GameDev 2 Player Sample

As you can imagine, it uses scripting for the second player.
It's also even possible to have two players over a network using this sample:
GameDev Net Play Sample

[bat]

thanks!