Ok, so the first poster says a Pokemon. The second poster says if they would want that Pokemon as a pet or not, why or why not, then gives another Pokemon. The third poster does the same, and so on and so forth. Example:
Poster 1: Ludicolo
Poster 2: Yeah! It'd be awesome for parties!
Poster 3: No way, that thing's plain creepy...
And so on. Aff SPPf rules apply. GO!