S+: Metaknight
S: Snake
A: Falco, Pit (too high, granted they have Masashi but even then I've not seen a Pit player whp blew me away and made me think he was that good.) Marth, Fox (definitely too high, this one is severely off lol. Wario and Diddy and even potentially Dedede have better matchup spreads than Fox does.) Wario, Diddy, King Dedede
B: Olimar, Game and Watch, Zelda/Shiek (Shiek by herself might be this high, Zelda clearly is not though) Wolf (ZSS is probably better, I think IC's are too), Zero Suit Samus, ROB
C: Ice Climbers, Toon Link, Kirby, Lucario, Pikachu (is a bit low, but then again he doesn't dominate the cast that much and still lacks representation.)
D: Donkey Kong (every character listed above him could reasonable be better than DK. Our list probably won't have DK this low, but they aren't "weird" for putting him here. It's understandable.), Peach, Ike, Lucas, Mario
E: Bowser, Pokemon Trainer, Link, Yoshi, Ness (I think he's better than Yoshi, but then again he has some ******** bad matchups), Luigi (Even though I think Luigi is garbage, I don't think he's THIS bad lol)
F: Ganon (BIG no no lol. Samus and Jigglypuff are CLEARLY better than Ganon. Like, not even the same level od garbage as Ganon.), Samus, Falcon, Sonic (He is too slow apparently), Jigglypuff (FLARBLE GARBLE GARBLE WHAT IS THIS NONSENSE!?!?!?!?)
My thoughts added to their tier list.
I also want to say that making a statement like "Japan is way better/more advanced in the metagame than the US" is silly.
1. Japan and the US haven't "clashed" or wagered war in any big tournaments. Few US players have visited Japan and seen first hand/played first hand with them, and vice verse for them.
2. I think both regions approach/see the game in different lights. We value somethings in Brawl more than they do, and they probably favor other things than us. It would be more likely that they are on a different "tangent" of metagame instead of ahead of us.
3. Just my opinion from watching their top level and lower matches, but I think the US would indeed beat them in, say a large crew battle or if the better US players traveled over there and entered a big tournament. Like I said, there's no way to definitely tell, but that is what I infer from watching a lot of their matches (not to discredit them of course).