This is for those of you that keep getting killed by final smashes, most of the time I
will say spam your ground dodge.

Mario's Final Smash
Best way to dodge, Get behind (or directly above or below) Mario when he uses his Final
Smash.
Other way, Roll dodge TOWARDS the attack, not away.

Luigi's Final Smash
The only way to avoid this one is to not get into the effected zone.

Peach's Final Smash
Stay in the air (being Jigglypuff, Kirby, or Pit is ideal.)

Bowser's Final Smash
Spam the ground dodge and hope for the best.

DK's Final Smash
If the player can use it right, Spam that ground dodge!
If the player screws it up, Just put a little distance.

Diddy's Final Smash
You might want to spam the ground dodge here too.

Yoshi's Final Smash
Again, you should spam the ground dodge.

Wario's Final Smash
More dodge spamming for this one.

Link's and Toon Link's Final Smash
Stay away from Link when he has the smash ball!
If someone else is hit by the Final Smash, Stay away because you still can get hurt.

Zelda/Sheik's Final Smash
Jump when she uses it.  It stuns you if you don't jump.

Ganandorf's Final Smash
Same as Zelda/Sheik's Final Smash.

Kirby's Final Smash
Be far away from him when he uses it, or spam your dodge when he's banging the utensils.

King DeDeDe's Final Smash
It's almost impossible to dodge it without getting hit ONCE, but dodge spamming will help.
The Waddle De's might be reflectable, but I don't know.

Metaknight's Final Smash
If he hits you with his cape, you're toast.
If he hits someone else with his cape, spam the dodge to avoid getting hit.

Olimar's Final Smash
Spam the dodge to avoid as much damage as possible, and when the ship comes down, jump

Samus's Final Smash
Get behind her when she uses her Final Smash.
I also heard about Pit blocking this Final Smash with his mirror shield (his b-down)

Ice Climber's Final Smash
Jump and stay in the air!

Pit's Final Smash
Spam the dodge.
You might be able to reflect the warriors, but I don't know.

R.O.B.'s Final Smash
STAY AWAY FROM HIM!

Pikachu's Final Smash
Spam the dodge, and hope the player has problems controlling the Final Smash.

Pokemon Trainer's Final Smash
Same as Mario.

Jigglypuff's Final Smash
RUN AWAY!
Note-This Final Smash hurts members on the same team, even with the attack team OFF.

Fox's Final Smash
Jump on the Landmaster, jump when it's going to fire, AND GET OFF IF IT STARTS RISE!

Falco's Final Smash
Same as Fox's Final Smash but you should get off the tank even if you THINK the tank will
rise because it will rise faster than Fox's Landmaster.

Wolf's Final Smash
Do NOT get on this Landmaster!
Wolf's Landmaster rises at a VERY HIGH SPEED!

Marth's Final Smash
Jump, or roll dodge TOWARDS Marth, I cannot stress enough that ground dodging is USELESS
with this Final Smash!

Ike's Final Smash
Just stay away from him.

Ness's and Lucus's Final Smash
Note where the meteors are falling, and go to a spot you think is safe.
If that fails, you know what to spam.

Mr. Game and Watch's Final Smash
Just stay away from him when he's an octopus.
This will be easy because he can't go everywhere.

Sonic's Final Smash
DODGE SPAM FOR YOUR LIFE!!!

Snake's Final Smash
Hope you aren't the target and DON'T STOP MOVING!

I hope this helps.