Why is DK so much better than Bowser?
DK is faster, has better range, far better airgame and is smaller than Bowser (despite not much).
Anyway...
"Tier Groups" - this is supposed to be the characters who have about the same potential, and should always stick together in one group. The characters are easily exchangeable inside of this group.
S: Meta Knight, Snake, Wario
A: King Dedede, Falco, Diddy, Marth, Mr. Game & Watch
B: ROB, Lucario, Olimar, Pikachu, Ice Climbers
C: Zero Suit Samus, Donkey Kong, Kirby, Zelda/Sheik
D: Toon Link, Peach, Pit, Wolf, Luigi
E: Zelda, Sheik, Fox, Bowser, Ike, Ness
F: Mario, Pokémon Trainer, Sonic, Yoshi
G: Lucas, Samus, Link
H: Jigglypuff, Ganondorf, Captain Falcon