This thread looks amazing. I was going to propose that Somalia be the leader of team Luck Sacks, and the only way to defeat him is by energy ball jellicent, but I see Chou has already made that joke...
EDIT: Okay I actually have an idea now. Two actually,
Rival 2 Proposal: A second rival, this time a guy with an Ash team. Now hear me out on this one: the purpose of this game is to educate the masses on proper competitive battling, correct? Well there is more than one way to accomplish this, in the case of this rival it is through inexample!
For instance, newer players to Smogon will be able to clearly see the difference between this Ash team and the one made by the other rival. The first rivals team will be difficult to defeat, and by comparison the guy with an ash team will be easy as pie. This will incline players to imitate the style of the rival instead of the Ash team. Winning!
NPC proposal: This one hasn't been brought up yet, but we need Karen (G/S, HG/SS) into this game. Because of course, if we are to properly portray ourselves as elitist dickholes (as the cover says) then we must include the Karenites, our biggest critics, in some way. And what better way than to include the original Karen?
Possible scripts:
Karen: "Use your favorite Pokemon in battle! If you just believe in your Pokemon and treat them well, any Pokemon can become strong. Strong and weak Pokemon are the ideals of the foolish trainer. All Pokemon can be strong!"
Karenite follower (before battle): "I'm using all my favorites in this battle! There's no way I can lose with our friendship!"
Karenite follower (after battle): "You didn't even use the ones you liked! ;-;"