Flavour is optional:
For an unkown amount of time, you have been cramped with these others in this box. It is, in some ways, comfortable - but it is also a prison, and all of you know it. Be that as it may, you are all intensely loyal to he who trapped you here, and you know, you just know, that if you wait patiently enough, someday he will give you an opportunity to serve him or at least free you back into the wild.
It seems, though, something has infected your cramped home. A dark force has worked it way inside, and those who have fallen under its influence have decided that they must force the masters hand. And when he looks inside to see what has happened, when he notices the alerts, when he lets them out... they will have their revenge on him.
This everyone knows, because it is written on the walls in the inky blood of the viciously murdered Tentacool, always the the core of humour and levity in your little forced community. Whoever these scum are, they are daring, and you have a feeling that this is not the last murder. Already Tentacool's body has started to fade as the computer frees his allocated storage space. He is not merely dead - he has been deleted, wiped clean, as if he never was. This is no pokemon battle - this is life or death, and you must destroy them before they destroy you.
This evil must never be allowed to escape the confines of Pokemon Box #058!
Summarized: You are all pokemon, two of you have become Shadow Pokemon - Scum, Mafia, and they must be cleansed the only way you know how... through votes!
Okay, as always in Beginners Mafia, theme is optional. Note, however, your pokemon has no relation to your roles. Feel free to share or whatever you want, but remember that the town's primary goal is always to root out the scum, and the scum's primary goal is always to win - flavour comes second.
Note Well:
Most of you have an "RP Ability". This has no actual effect on the game whatsoever, and is just there for flavour. If you wish, you can feel free to ignore it.