Taken right from this link:
http://allisbrawl.com/forum/topic.aspx?id=4134
Bowser
Fire Breath YES 1-8% - dmg/13% heal (note: this is from one button tap of fire breath, can fluctuate)
Captain Falcon
n/a
Diddy Kong
Peanuts NO, Bananas NO
Donkey Kong
n/a
Falco
Blaster YES 3% dmg - /5% heal
Fox
Blaster YES 2% dmg - /5% heal
Game & Watch
Chef NO
Ganondorf
n/a
Ice Climbers
Ice Shot NO, Blizzard YES 1-18% - dmg/2-68% heal
Ike
n/a
Jigglypuff
n/a
King Dedede
Super Dedede Jump YES 11% dmg - /8% heal (from stars only), Waddle Dees NO, Waddle Doo Attacks YES 3-21% dmg - /?-39% heal
Kirby
Final Cutter YES 6% dmg - /10% heal
Link
Arrows NO, Bombs NO, Boomerang NO
Lucario
Aura Sphere YES 5-26% dmg - /1-30% heal, Force Palm YES 6-12% dmg - /11-22% heal
Lucas
PK Thunder YES 10% dmg - /16% heal, PK Fire YES 8% dmg - /5% heal, PK Freeze YES 10-18% dmg - /16-38% heal
Luigi
Fireballs YES 6% dmg - /10% heal
Marth
n/a
Mario
Fireballs YES 5% dmg - /8% heal, FLUDD NO
Meta Knight
n/a
Ness
PK Thunder YES 8% dmg - /13% heal, PK Fire YES 1-22% dmg - /7% heal, PK Flash YES 10-37% dmg - /15-30% heal
Peach
Vegetables NO, Toad spores YES 1-2% dmg - /5-45% heal
Pikachu
Thunder Jolt YES 6% dmg - /10% heal, Thunder YES 10-17% dmg - /16% heal
Pikmin & Olimar
Pikmin NO
Pit
Arrows YES 5-11% dmg - /8-18% heal
Pokemon Trainer
-Charizard: Flamethrower YES 1-22% dmg - /1-infinity% heal (note: this was done holding the b button down until Ness was knocked back too far or his PSI Magnet stopped)
-Squirtle: Water Gun NO
-Ivysaur: Razor Leaf NO, Bullet Seed NO
R.O.B.
Lasers YES 5-9% dmg - /8-25% heal, Gyro NO
Samus
Charge Shot YES 3-25% dmg - /5-30% heal, Missiles NO, Bombs NO
Sheik
Needles NO
Snake
Grenades NO, Mortar NO, Nikita NO, C4 NO, Claymores NO
Sonic
n/a
Toon Link
Arrows NO, Bombs NO, Boomerang NO
Wario
Bike tires NO, Waft NO
Wolf
Blaster YES 6% dmg - /10% heal
Yoshi
Eggs NO
Zelda
Din's fire YES 8-16% dmg - /13-25% heal
Zero Suit Samus
Paralyzer YES 4-6% dmg - /6-9% heal, Dsmash YES 11-15% dmg - /18-25% heal