Best 5 in no order

Sonic, If used well it is devestating
Link/Toon Link, kill most of the time depends on the damage not to mention it looks awsome
Zelda/Shiek, Instant kill pretty much
Captain Olimar, can't be avoided
Marth, instant kill but if miss in the air you fly off the screen

Worst 5 in no order

DK, Easy to avoid and doesn't do much
ROB, Honastly, where's the KO?
Jigglypuff, only good on really small stages and you have to be close to opponent
King Dedede, compleatly random and doesn't do a whole lot unless the spike enemy hits
Kirby, so it always does damage but it's not good at all

then again it's just my opinion

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Currently playing: Pokemon Red (For original Game boy), Zach and Wiki (Wii), Elite Beat Agents (DS), and 007 Nightfire (GC)

Can't wait for Animal Crossing Wii!