http://boards.gamefaqs.com/gfaqs/genmessage.php?board=516492&topic=34730647
Taken from the link above:
"Top Tier: Yoshi
Bottom Tier: Bowser, Captain Falcon, Donkey Kong, Fox, Ice Climbers, Kirby, Link, Mario, Peach, Pikachu, Samus, Zelda, Ness, Dr. Mario, Falco, Ganondorf, Jigglypuff, Luig,i Marth, Mewtwo, Mr. Game & Watch, Pichu, Roy, Young Link.
Top Tier reason: YOSHI IS TEH PWN!1!!2!21!
Bottom Tier reason: EVERYONE ELSE IS TEH SUXX@!!@1@!!1!#112!
Nuff’ Said."