Trick Room is a dominating force in VGC, which is part of the BW2 metagame, so therefore it is indeed heard of. Also, please edit your post instead of posting multiple times.
Also, I'll take the last of the A Pokemon so we can speed this up.
Anorith - C Rank
Pretty much a physical version of Staryu, can spin but is weak to Stealth Rock. For a spinner, that's a pretty big issue. Plus, Staryu has Recover and can generally take hits better than Anorith ever could. It does have some merit with a Swords Dance set, but otherwise it's not really that good.
Aron - D Rank
Despite having Rock Head and STAB Head Smash, Aron is 4x weak to fighting. I'll stop there because that is literally all I need to say about Aron.