Mmac
Smash Lord
Yep, Yoshi has Ninja Skills! He can Ping out tons of Projectiles with his Bair and Jabs. I put together A handy Chart to tell you What Yoshi can and can not Block. Also Jump Man helped me with this, and ask me to give him partial credit because he's Awesome.
Mario - Fireball: Bair: Yes / Jab: Yes / Nair: Yes
Luigi - Fireball: Bair: Yes / Jab: Yes / Nair: Yes
Peach - Normal Turnip: Bair: Yes / Jab: Yes
Peach - Zombie Turnip: Bair: ??? / Jab: ??? (These things are a ***** to find >_<)
Peach - Mr. Saturn: Bair: Yes / Jab: Yes
Peach - Beam Sword: Bair: ??? / Jab: ??? (Still needs testing)
Peach - Bob-Omb: Bair: No / Jab: God No! (Dumb***! They EXPLODE!)
Diddy - Peanuts: Bair: Yes / Jab: Yes / Nair: Yes
Diddy - Bananas: Bair: No / Jab: No (No Banana Flicking for us )
Yoshi - Egg Toss: Bair: No / Jab: No / Nair: No(You can't Out-Ninja our own Kind )
Wario - Bike Wheels: Bair: Yes / Jab: Yes
Wario - The Bike Itself: Bair: Yes / Jab: No / Nair: Yes (Yep, Yoshi can stop Wario's Hog dead cold!)
Link/Toon Link - Arrows: Bair: Yes / Jab: Yes / Nair: Yes
Link/Toon Link - Boomerang: Bair: Yes / Jab: Yes / Nair: Yes
Link/Toon Link - Bombs: Bair: No / Jab: No (They also Explode.)
Zelda - Din's Fire: Bair: Yes! / Jab: No / Nair: Yes(You can indeed Ping it out with Bair! Nair Works even better though!)
Sheik - Needles: Bair: No / Jab: No / Nair: No(Sheik Out-Ninja's Yoshi ;_ ; )
Samus - Uncharged Shot: Bair: Yes / Jab: Yes / Nair: Yes
Samus - Charged Shot: Bair: Yes! / Jab: No / Nair: Yes(Yoshi's Bair and Nair does Ping out a charged shot. Dead Serious!)
Samus - Missile: Bair: Yes / Jab: Yes / Nair: Yes
Samus - Super Missile: Bair: Yes / Jab: Yes / Nair: No
ZSS - Armour Parts: Bair: Yes / Jab: Yes
ZSS - Paralyzer: Bair: Yes / Jab: Yes / Nair: Yes
Pit - Arrows: Bair: Yes / Jab: Yes / Nair: Yes / Dair: Yes (You need some very Ninja Like Reflexes for the Jab)
Ice Climbers - Ice Shot: Bair: Yes / Jab: Yes / Nair: Yes
ROB - Laser: Bair: No / Jab: No / Nair: No
ROB - Gyro Weak Launch: Bair: Yes / Jab: Yes
ROB - Gyro Charged Shot: Bair: Yes / Jab: No
ROB - Gyro Throw: Bair: Yes / Jab: Yes
Kirby - Cutter: Bair: No / Jab: No / Nair: No (It eats through Ninjas)
Dedede - Waddle Dee: Bair: Yes / Jab: Yes / Nair: Yes
Dedede - Waddle Doo: Bair: Yes / Jab: Yes / Nair: Yes
Dedede - Gordo: Bair: No / Jab: No / Nair: Yes (Nair Stops it surprisingly)
Olimar - Pikmin Throw: Bair: Yes / Jab: Yes / Nair: Yes (Even the purple ones!)
Olimar - Smashes: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes on Usmash (Yep, Not even Smashes can withstand!)
Fox - Blaster: Bair: No / Jab: No / Nair: No (But Why?)
Falco - Blaster: Bair: No / Jab: No / Nair: No (Laser's are apparently the Anti-Ninja)
Wolf - Blaster: Bair: No / Jab: No / Nair: No (Sorry Pride )
Pikachu - Thunder Jolt: Bair: Yes / Jab: Yes
Ivysaur - Razor Leaf: Bair: Yes / Jab: Yes
Lucario - Sphere, Uncharged: Bair: Yes / Jab: Yes / Nair: Yes / Dair: Yes
Lucario - Sphere, 0% Charged: Bair: Yes / Jab: Yes / Nair: No / Dair: Yes
Lucario - Sphere, 100% Charged: Bair: No / Jab: No / Nair: No / Dair: Yes
Lucario - Sphere, 200% Charged: Bair: No / Jab: No / Nair: No / Dair: No / SideB: Yes (SideB can withstand the 200% Sphere!)
Ness - PK Fire: Bair: No / Jab: No / Nair: No
Ness - PK Thunder: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes
Lucas - PK Fire: Bair: No / Jab: No / Nair: No
Lucas - PK Thunder: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes
Game & Watch - Chef: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes(Jabbing and Nair is useless though...)
Snake - Grenade: Bair: No / Jab: No / Dair: No
Snake - Missile: Bair: Yes / Jab: Yes / Nair: Yes / Dair: Yes (Dair makes it go down, which might be a problem)
Snake - Mortar: Bair: Yes / Dair: No / Nair: Yes / DownB: Yes (The only thing DownB Works on)
Nair: The Quicker Picker Upper!
Nair is awesome for Picking up Projectiles out of the sky! I didn't list them for most of the Item Projectiles, because he just Snags em out of the Sky, And with Style! This works with Everything, so give it a Try!
Almost done, just need to test a few more
Mario - Fireball: Bair: Yes / Jab: Yes / Nair: Yes
Luigi - Fireball: Bair: Yes / Jab: Yes / Nair: Yes
Peach - Normal Turnip: Bair: Yes / Jab: Yes
Peach - Zombie Turnip: Bair: ??? / Jab: ??? (These things are a ***** to find >_<)
Peach - Mr. Saturn: Bair: Yes / Jab: Yes
Peach - Beam Sword: Bair: ??? / Jab: ??? (Still needs testing)
Peach - Bob-Omb: Bair: No / Jab: God No! (Dumb***! They EXPLODE!)
Diddy - Peanuts: Bair: Yes / Jab: Yes / Nair: Yes
Diddy - Bananas: Bair: No / Jab: No (No Banana Flicking for us )
Yoshi - Egg Toss: Bair: No / Jab: No / Nair: No(You can't Out-Ninja our own Kind )
Wario - Bike Wheels: Bair: Yes / Jab: Yes
Wario - The Bike Itself: Bair: Yes / Jab: No / Nair: Yes (Yep, Yoshi can stop Wario's Hog dead cold!)
Link/Toon Link - Arrows: Bair: Yes / Jab: Yes / Nair: Yes
Link/Toon Link - Boomerang: Bair: Yes / Jab: Yes / Nair: Yes
Link/Toon Link - Bombs: Bair: No / Jab: No (They also Explode.)
Zelda - Din's Fire: Bair: Yes! / Jab: No / Nair: Yes(You can indeed Ping it out with Bair! Nair Works even better though!)
Sheik - Needles: Bair: No / Jab: No / Nair: No(Sheik Out-Ninja's Yoshi ;_ ; )
Samus - Uncharged Shot: Bair: Yes / Jab: Yes / Nair: Yes
Samus - Charged Shot: Bair: Yes! / Jab: No / Nair: Yes(Yoshi's Bair and Nair does Ping out a charged shot. Dead Serious!)
Samus - Missile: Bair: Yes / Jab: Yes / Nair: Yes
Samus - Super Missile: Bair: Yes / Jab: Yes / Nair: No
ZSS - Armour Parts: Bair: Yes / Jab: Yes
ZSS - Paralyzer: Bair: Yes / Jab: Yes / Nair: Yes
Pit - Arrows: Bair: Yes / Jab: Yes / Nair: Yes / Dair: Yes (You need some very Ninja Like Reflexes for the Jab)
Ice Climbers - Ice Shot: Bair: Yes / Jab: Yes / Nair: Yes
ROB - Laser: Bair: No / Jab: No / Nair: No
ROB - Gyro Weak Launch: Bair: Yes / Jab: Yes
ROB - Gyro Charged Shot: Bair: Yes / Jab: No
ROB - Gyro Throw: Bair: Yes / Jab: Yes
Kirby - Cutter: Bair: No / Jab: No / Nair: No (It eats through Ninjas)
Dedede - Waddle Dee: Bair: Yes / Jab: Yes / Nair: Yes
Dedede - Waddle Doo: Bair: Yes / Jab: Yes / Nair: Yes
Dedede - Gordo: Bair: No / Jab: No / Nair: Yes (Nair Stops it surprisingly)
Olimar - Pikmin Throw: Bair: Yes / Jab: Yes / Nair: Yes (Even the purple ones!)
Olimar - Smashes: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes on Usmash (Yep, Not even Smashes can withstand!)
Fox - Blaster: Bair: No / Jab: No / Nair: No (But Why?)
Falco - Blaster: Bair: No / Jab: No / Nair: No (Laser's are apparently the Anti-Ninja)
Wolf - Blaster: Bair: No / Jab: No / Nair: No (Sorry Pride )
Pikachu - Thunder Jolt: Bair: Yes / Jab: Yes
Ivysaur - Razor Leaf: Bair: Yes / Jab: Yes
Lucario - Sphere, Uncharged: Bair: Yes / Jab: Yes / Nair: Yes / Dair: Yes
Lucario - Sphere, 0% Charged: Bair: Yes / Jab: Yes / Nair: No / Dair: Yes
Lucario - Sphere, 100% Charged: Bair: No / Jab: No / Nair: No / Dair: Yes
Lucario - Sphere, 200% Charged: Bair: No / Jab: No / Nair: No / Dair: No / SideB: Yes (SideB can withstand the 200% Sphere!)
Ness - PK Fire: Bair: No / Jab: No / Nair: No
Ness - PK Thunder: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes
Lucas - PK Fire: Bair: No / Jab: No / Nair: No
Lucas - PK Thunder: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes
Game & Watch - Chef: Bair: Yes / Jab: Yes / Dair: Yes / Nair: Yes(Jabbing and Nair is useless though...)
Snake - Grenade: Bair: No / Jab: No / Dair: No
Snake - Missile: Bair: Yes / Jab: Yes / Nair: Yes / Dair: Yes (Dair makes it go down, which might be a problem)
Snake - Mortar: Bair: Yes / Dair: No / Nair: Yes / DownB: Yes (The only thing DownB Works on)
Nair: The Quicker Picker Upper!
Nair is awesome for Picking up Projectiles out of the sky! I didn't list them for most of the Item Projectiles, because he just Snags em out of the Sky, And with Style! This works with Everything, so give it a Try!
Almost done, just need to test a few more