Happy Feet. Wombo Combo. OH, OH, OOOOOHHHH!

It's

100

up air -> up air -> up air -> up air -> up b

Mario

200

side b -> jump cancel -> up air -> up air -> up air -> foward/back air

Bowser Jr.

300

Stomp Knee

Captain Falcon

400

Jab -> forward smash

Chrom

500

The Booyah!!!!

Inkling

Random

100

Side b -> Roll read -> F smash

Ganondorf

200

Down B -> F smash

Simon

300

Side B -> literally anything

Duck Hunt Duo

400

Side b -> side b -> any aerial

Robin

500

The Yoinky Sploinky

Mega Man

So

100

Tornado -> up air

Mii Swordfighter

200

Side b -> up b

Pokemon Trainer (ivysaur)

300

Bomb -> forward air

Toon Link

400

PK fire -> anything

Ness

500

nair -> nair -> nair -> nair -> nair....

Palutena

Good

100

Down throw -> nair

Mii Gunner

200

Down Smash -> Forward Smash

Mr. G&W

300

Falling up air -> neutral B

Piranha Plant

400

Up Throw -> Up Tilt

Sephiroth

500

Bomb Loops

Link

Luck

100

Camping

Sonic

200

Up tilt -> Up tilt -> Up Tilt -> Up Tilt -> Neutral B -> Up Tilt -> Neutral B -> Up Smash

Steve

300

Down Throw -> Up B

Mythra

400

Nair -> Down B -> Side B

R.O.B.

500

Down Throw -> Down Air -> Neutral Air -> Down Air -> Up Air -> Up B

Luigi