Greatest Final Smash.

[Qsmash]

I'd say either Marth's, King Dedede's, Sonic's, Lucas' or Kirby's.

Kirby's final smash is too easy to dodge.

[Shujinco2]

I'd say either Marth's, King Dedede's, Sonic's, Lucas' or Kirby's.

Kirby's final smash is too easy to dodge.

I'm pretty dang good with kirby. Trust me, if you can dodge MY kirby.

[Qsmash]

I'd say either Marth's, King Dedede's, Sonic's, Lucas' or Kirby's.

Kirby's final smash is too easy to dodge.

I'm pretty dang good with kirby. Trust me, if you can dodge MY kirby.

I'll deflate your kirby. D:

[HTA!]

Marth.

[FruitFlow]

I'd have to say Link's

[Shaleblade]

Samus-It's about a OHKO
Link-If you hit, OHKO (almost :P)
I dunno.

[Kilroy]

Olimar: A bad character gets a good FS!? Well, he crashes his SPACESHIP onto the battlefield! How much more awesome could this be? A lot.

You got it backwards.

Olimar is a great character, with one of the easiest FS's to dodge in the game, right next to DK's.

Really, the Pitfall effect can be escaped from before he crashes his ship, and at 0% it's not an instant kill. How lame.

[Shujinco2]

I'd say either Marth's, King Dedede's, Sonic's, Lucas' or Kirby's.

Kirby's final smash is too easy to dodge.

I'm pretty dang good with kirby. Trust me, if you can dodge MY kirby.

I'll deflate your kirby. D:

That's an LOL worthy comment. :D

LOL.

[Triforce_Luigi]

Olimar: A bad character gets a good FS!? Well, he crashes his SPACESHIP onto the battlefield! How much more awesome could this be? A lot.

You got it backwards.

Olimar is a great character, with one of the easiest FS's to dodge in the game, right next to DK's.

Really, the Pitfall effect can be escaped from before he crashes his ship, and at 0% it's not an instant kill. How lame.

I always thought that, while not the best FS, Olimar's is fairly powerful. It, like Peach's, reflects his abilities. Olimar mainly fights with his Pikmin, which when thrown will leech on to an opponent and slowly weaken. Olimar's FS will damage characters rather than kill them, by wreaking havoc on the stage with Bulborbs and other such monsters. The rocket falling down is just an added plus, and if you're lucky, you might hit and get a kill.

Similarly, Peach is always the damsel-in-distress, reflected in her attacks, such as using Toad as a defense. Her powers are mainly focused on defense and avoidance, though she does have impressive power for a girl. Likewise, her FS is more defense-based, putting enemies to sleep and allowing her to heal herself. Granted, it is fairly easy to dodge, but if you do manage to hit the foe, you have a chance to both heal and deal an attack or two.

The best Final Smash, I think, would be either Marth's, Ike's, or Zelda's. Ike has a OHKO if the enemy is sufficiently weakened. Marth's, although hard to hit multiple foes with, is pretty much a OHKO. Zelda's is great against groups of enemies trying to rush you all at once, although it's power is somewhat weakened in one on one matches. Another pretty good FS is Giga Bowser, although that loses much of its potentcy on larger stages, it is efficient on small stages like Final Destination. Yoshi has a very powerful FS, capable of destroying the foe either through touch or flame. Link and Toon Link's Final Smashes are powerful and can KO at high enough percentages, are fairly easy to escape. Snake's FS is a hard-to-dodge, powerful attack. although if the user has terrible aim, that might not be the case.

One of the worst Final Smashes would definitely be Donkey Kong's. Although it makes an excellent edge-guard, it is incredibly easy to avoid. However, it is capable of being highly effective if the wielder has good timing with button presses. Other bad ones might include Pikachu and Sonic's. They are powerful, but the high speed and inertia makes it very hard to control, and again, are best in the hands of an expert. Diddy Kong is very hard to control in his FS, and has a chance of healing the foe.

Lol, I'm done. I think all of the Final Smashes has its own merit, as well as a disadvantage. So yeah.