To do this, you must watch the show on Cartoon Network.
In an RPG, you act as if you're a character. All you have to do is create a character on the other forum, (Create a Spy or Villain) or just create one here.
i.e., A spy:
Name: Kat Cat
Weight: 88 lbs
Eyes: dark brown
Hair: black with dark brown streaks, usually in a pony-tail
You do the villains the same way.
character: (shakes other character's hand) Hi!
character: (smiles) Hello!
That's how you do it!
Now let's start posting!