Boo Blah

Boo Blah is an enemy in Super Mario World 2: Yoshi's Island and Yoshi's New Island. It is a type of ghost attached to the floor or the ceiling, from which it stretches out at random to try and attack Yoshi, somewhat similar to a Stretch's attack pattern from Super Mario Bros. 3.

Despite having "Boo" in their name, Boo Blahs are not a Boo variant.

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Characters	Protagonists	Green Yoshi • Blue Yoshi • Brown Yoshi • Light Blue Yoshi • Pink Yoshi • Purple Yoshi • Red Yoshi • Yellow Yoshi
	Antagonists	Baby Bowser • Kamek
	Supporting	Baby Mario • Baby Luigi • Stork • Poochy • Melon Bug • Huffin' Puffin • Muddy Buddy • Support Ghost • Liquid lift
Enemies	Enemies	Aqua Lakitu • Bandit • Barney Bubble • Baron von Zeppelin • Beach Koopa • Big Boo • Big Shy Guy • Blow Hard • Boo • Boo Balloon • Boo Blah • Boo Guy • Boo Man Bluff • Bouncing Bullet Bill • Bowling Goonie • Bubble Dayzee • Bullet Bill • Bumpty • Burt • Cactus Jack • Caged Ghost • Chain Chomp • Incoming Chomp • Cheep Cheep • Chomp Shark • Clawdaddy • Cloud Drop • Co-Blargg • Coin Bandit • Crazee Dayzee • Dancing Spear Guy • Dangling Ghost • Dizzy Dandy • Dr. Freezegood • Eggo-Dil • Fang • Fat Guy • Fishin' Lakitu • Flightless Goonie • Flightless Skeleton Goonie • Flopsy Fish • Flutter • Fly Guy • Frog Pirate • Fuzzy • Gargantua Blargg • Georgette Jelly • Green Glove • Grinder • Goomba • Goonie • Grim Leecher • Grunt • Gusty • Harry Hedgehog • Hefty Goonie • Hootie the Blue Fish • Hot Lips • Jean de Fillet • Kaboomba • Kamek's Toadies • Koopa Troopa • Lakitu • Lantern Ghost • Lava Drop • Lemondrop • Little Mouser • Little Skull Mouser • Loch Nestor • Lunge Fish • Mace Guy • Milde • Mini-Raven • Mock Up • Mufti Guy • Naval Bud • Needlenose • Needlenose Plant • Nep-Enut • Nipper Plant • Nipper Spore • Paratroopa • Piscatory Pete • Podoboo • Pokey • Potted Spiked Fun Guy • Preying Mantas • Puchipuchi L • Raven • Rip Van Fish • Seedy Sally • Short Fuse • Shy Guy • Skeleton Goonie • Slime • Slugger • Sluggy • Snifit • Solo Toady • Spear Guy • Spike • Spiked Fun Guy • Spooky • Spray Fish • Stilt Guy • Stretch • Tap-Tap • Thunder Lakitu • Whirly Fly Guy • Wild Piranha • Wild Ptooie Piranha • Woozy Guy • Zeus Guy
Enemies	Bosses	Burt the Bashful • Salvo the Slime • Bigger Boo • Roger the Potted Ghost • Prince Froggy • Naval Piranha • Marching Milde • Hookbill the Koopa • Sluggy the Unshaven • Raphael the Raven • Tap-Tap the Red Nose • Baby Bowser
Items	General	Blue watermelon • Coin • Green Shell • Green watermelon • Key • Red coin • Red Shell • Red watermelon • Special Flower • Star • Super Star • Yoshi Egg (Flashing Egg · Giant Egg · Red Egg · Yellow Egg)
Items	Special Items	10-Point Star • 20-Point Star • Anytime Egg • Anywhere POW • Winged Cloud Maker • Magnifying Glass • Super Green Watermelon • Super Red Watermelon • Super Blue Watermelon
Objects	Objects	! Block • Arrow block • Arrow Cloud • Balloon (Mini Battle) • Balloon (platform) • Beanstalk • Breakable block • Bubble • Bucket • Chomp Rock • Coin Block • Countdown Platform • Cracked block • Current • Donut Lift • Dotted-Line Block • Egg Block • Egg Plant • Expansion Block • Falling stone block • Flatbed Ferry • Flipper • GOAL! Ring • Ice Block • Icicle • Makeshift surfboard • Message Block • Middle Ring • Morph Bubble • Moving Block • Paddle wheel • Post • Pot • POW Block • Red-and-yellow bridge • Red balloon • Rolling rock • Ski Lift • Snowball • Spinning Log • Spinning wheel • Spotted platform • Spring Ball • Squishy block • Switch • Teeter-totter • Track ball • Tulip • Tumbler • Warp Pipe • Winged Cloud • Yoshi Block
Objects	Obstacles	Ball 'n' Chain • Bill Blaster • Cannonball • Lava • Makiage Dosun • Spike • Spiked Ball • Spiked Weight • Spinning Fireballs • Thorn
Worlds	World 0	Welcome To Yoshi's Island (0-0)
	World 1	Make Eggs, Throw Eggs (1-1) • Watch Out Below! (1-2) • The Cave Of Chomp Rock (1-3) • Burt the Bashful's Fort (1-4) • Hop! Hop! Donut Lifts (1-5) • Shy Guys On Stilts (1-6) • Touch Fuzzy, Get Dizzy (1-7) • Salvo the Slime's Castle (1-8) • Poochy Ain't Stupid (1-★)
	World 2	Visit Koopa And Para-Koopa (World 2-1) • The Baseball Boys (2-2) • What's Gusty Taste Like? (2-3) • Bigger Boo's Fort (2-4) • Watch Out For Lakitu (2-5) • The Cave Of The Mystery Maze (2-6) • Lakitu's Wall (2-7) • The Potted Ghost's Castle (2-8) • Hit That Switch!! (2-★)
	World 3	Welcome to Monkey World! (3-1) • Jungle Rhythm (3-2) • Nep-Enut's Domain (3-3) • Prince Froggy's Fort (3-4) • Jammin' Through The Trees (3-5) • The Cave Of Harry Hedgehog (3-6) • Monkey's Favorite Lake (3-7) • Naval Piranha's Castle (3-8) • Hit That Switch!! (3-★)
	World 4	GO! GO! MARIO!! (4-1) • The Cave Of The Lakitus (4-2) • Don't Look Back! (4-3) • Marching Milde's Fort (4-4) • Chomp Rock Zone (4-5) • Lake Shore Paradise (4-6) • Ride Like The Wind (4-7) • Hookbill The Koopa's Castle (4-8) • The Impossible? Maze (4-★)
	World 5	BLIZZARD!!! (5-1) • Ride The Ski Lifts (5-2) • Danger - Icy Conditions Ahead (5-3) • Sluggy The Unshaven's Fort (5-4) • Goonie Rides! (5-5) • Welcome To Cloud World (5-6) • Shifting Platforms Ahead (5-7) • Raphael The Raven's Castle (5-8) • Kamek's Revenge (5-★)
	World 6	Scary Skeleton Goonies! (6-1) • The Cave Of The Bandits (6-2) • Beware The Spinning Logs (6-3) • Tap-Tap The Red Nose's Fort (6-4) • The Very Loooooong Cave (6-5) • The Deep Underground Maze (6-6) • KEEP MOVING!!!! (6-7) • King Bowser's Castle (6-8) • Ultimate Castle Challenge (6-★)
Forms	Morph Bubble	Car • Helicopter • Mole Tank • Submarine • Train
Minigames	Mini Battles	Gather Coins • Popping Balloons • Throwing Balloons • Watermelon Seed Spitting Contest
Minigames	Bonus Challenges	Flip Cards • Scratch and Match • Drawing Lots • Match Cards • Roulette • Slot Machine

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Characters	Protagonists	Yoshis (Green • Pink • Light Blue • Yellow • Purple • Orange • Blue) • Baby Mario • Baby Luigi • Stork
	Supporting	Mario • Poochy
	Bosses	Kamek • Big Beanie • Count Fang • King Clawdaddy • Fred de Fillet • Punkey the Pokey Prince • Baby Bowser • Mega Baby Bowser • Bowser • Giant Bowser
Enemies	Enemies	Bandit • Baron von Zeppelin • Beanie • Bill Blaster • Blooper • Blow Hard • Boo • Boo Blah • Boo Guy • Bouncing Bullet Bill • Bowling Goonie • Bubble Dayzee • Bullet Bill • Bumpty • Caged Ghost • Cheep Cheep • Chomp Shark • Clawdaddy • Cloud Drop • Co-Blargg • Coin Bandit • Crazee Dayzee • Dancing Spear Guy • Dangling Ghost • Deep Cheep • Dizzy Dandy • Door Shy Guy • Dr. Freezegood • Eggo-Dil • Fake Yoshi • Fang • Fishin' Lakitu • Flaming Chomp • Flightless Goonie • Flightless Skeleton Goonie • Flutter • Fly Guy • Gargantua Blargg • Goomba • Goonie • Grim Leecher • Grinder • Grunt • Gusty • Harry Hedgehog • Hefty Goonie • Hootie the Blue Fish • Hot Lips • Jean de Fillet • Kaboomba • Kamek's Toadies • Koopa Troopa • Large Milde • Large Raven • Lakitu • Lantern Ghost • Lava Drop • Little Mouser • Little Skull Mouser • Loch Nestor • Lunge Fish • Mace Guy • Mega Guy • Metal Guy • Mega Lantern Ghost • Metal Lantern Ghost • Milde • Mini-Raven • Mufti Guy • Nep-Enut • Needlenose • Needlenose Plant • Nipper Plant • Nipper Spore • Paratroopa • Piranha Plant • Piro Dangle • Pokey • Preying Mantas • Pyro Guy • Raven • Relay Shy Guy • Seedy Sally • Short Fuse • Shy Guy • Skeleton Goonie • Slime • Slime Drop • Solo Toady • Snifit • Spear Guy • Spiny Egg • Spray Fish • Stilt Guy • Tap-Tap • Tap-Tap the Golden • Thunder Lakitu • Tree Shy Guy • Unnoticed Shy Guy • Wall Lakitu • Whirly Fly Guy • White Pokey • Woozy Guy • Zeus Guy
Items and objects	Items	Coin • Egg Medal • Flutter Wings (Golden) • Hidden Coin • Key • Red Coin • Red watermelon • Rocket Star • Smiley Flower • Star • Super Star • Watermelon
Items and objects	Objects	! Block • ! Switch • Arrow wheel • Binoculars • Blarggwich • Blue watermelon • Bucket • Chomp Rock • Conveyor Belt • Countdown Platform • Crate • Donut Lift • Egg Block • Egg Plant • Expansion Block • Flatbed Ferry • Flipper • GOAL! Ring • Item Balloon • Large Donut Lift • Leaf platform • Mega Eggdozer • Message Block • Metal Eggdozer • Middle Ring • Paddle Platform • Post • Seesaw • Snowball • Spotted platform • Spring Ball • Switch Block • Tatami Block • Tulip • Warp Pipe • Whirly Gate • Winged Cloud • Wobble Rock • Yoshi egg (Flashing Egg · Red Egg · Yellow Egg)
Forms	Forms	Bobsled • Helicopter • Hot-Air Balloon • Jackhammer • Mine Cart • Submarine
Worlds	World 1	Little Eggs, Big Eggs (1-1) • Chomp Rock 'n' Roll (1-2) • Cave of the Nipper Plants (1-3) • Fort Bucket Booby Trap (1-4) • Heads Up, Hop Up (1-5) • Bouncy Beanstalk Walk (1-6) • Ground Pound Rebound (1-7) • Big Beanie's Castle (1-8) • Diagonal Valley Rally (1-S)
	World 2	Koopa Canyon (2-1) • Inside the Outside (2-2) • Seesaw Scramble (2-3) • Beware the Boo Brigade (2-4) • Lantern Ghost Grotto (2-5) • Gusty Glory (2-6) • Hidey-Hole Hooligans (2-7) • Count Fang's Castle (2-8) • All Aboard the Terrain Train (2-S)
	World 3	Rise of the Nasty Nep-Enuts (3-1) • Ukiki Jammin' (3-2) • Harry Hedgehog's Labyrinth (3-3) • Slime Drop Drama (3-4) • Don't Fear the Spear (3-5) • Ukiki Trouble in Clawdaddy Cove (3-6) • Lose the Lunge Fish (3-7) • King Clawdaddy's Sewer Castle (3-8) • Ride the Blarggwich (3-S)
	World 4	Hop 'n' Pop Till You Drop (4-1) • Underground Pokey Patrol (4-2) • Spin-Lift Drift (4-3) • Fort Key Calamity (4-4) • Metal Eggdozers on a Roll (4-5) • Chomp Shark Chase (4-6) • Flatbed Ferry Freefall (4-7) • Furious Fred de Fillet's Castle (4-8) • See Poochy Run! (4-S)
	World 5	Brave the Bumpty Blizzard (5-1) • Fine Feathered Friends or Foes? (5-2) • Ski Lift Leap (5-3) • Ready, Steady, Go! (5-4) • Cruise the Clouds (5-5) • Fire Watermelon Wonderland (5-6) • Eggstraordinary Terrain (5-7) • Punkey the Pokey Prince's Castle (5-8) • Snow Go Mountain (5-S)
	World 6	Chomp Rock Challenge (6-1) • Bandit Valley (6-2) • Gargantua Blargg Attacks! (6-3) • Spray Day Mayday (6-4) • Hotfoot Hurdle (6-5) • Pyro Guy Peak (6-6) • Crumble Rock Rumble (6-7) • Bowser's Castle Break-In (6-8) • Make Way for King Bowser! (6-BOWSER) • Leapin' Lava Meltdown (6-S)
Minigames	Minigames	Ground-Pound Pop • Tulip Toss • Flutter Fortune • Enemy Eat-Off • Eggy Pop • Flutter Finish
Miscellaneous	Other	Countdown Timer • Gallery