Description[]

It is found on the west side of Donut Plains, where it can become unlocked by taking the secret exit of Donut Plains 2. The palace holds the Green ! Switch that when activated will turn all the green Dotted-Line Blocks into Green ! Blocks.

Layout[]

Enemies[]

• Koopa Troopa

Notes[]

Once the Green ! Switch is activated, the level cannot be entered anymore.

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Characters	Protagonists	Mario • Princess Peach • Luigi • Yoshis (Green • Red • Blue • Yellow) • Dolphins
	Antagonists	Bowser • Iggy Koopa • Morton Koopa Jr. • Lemmy Koopa • Larry Koopa • Wendy O. Koopa • Roy Koopa • Ludwig von Koopa
Worlds	Yoshi's Island	Yoshi's House • Yoshi's Island 1 • Yoshi's Island 2 • Yoshi's Island 3 • Yoshi's Island 4 • Yellow Switch Palace • Iggy's Castle
	Donut Plains	Donut Plains 1 • Donut Plains 2 • Donut Plains 3 • Donut Plains 4 • Donut Secret 1 • Donut Secret House • Donut Secret 2 • Top Secret Area • Donut Ghost House • Green Switch Palace • Morton's Castle
	Vanilla Dome	Vanilla Dome 1 • Vanilla Dome 2 • Vanilla Dome 3 • Vanilla Dome 4 • Vanilla Secret 1 • Vanilla Secret 2 • Vanilla Secret 3 • Vanilla Ghost House • Vanilla Fortress • Red Switch Palace • Lemmy's Castle
	Twin Bridges	Cheese Bridge Area • Soda Lake • Cookie Mountain • Butter Bridge 1 • Butter Bridge 2 • Ludwig's Castle
	Forest of Illusion	Forest of Illusion 1 • Forest of Illusion 2 • Forest of Illusion 3 • Forest Ghost House • Forest of Illusion 4 • Forest Secret Area • Forest Fortress • Blue Switch Palace • Roy's Castle
	Chocolate Island	Chocolate Island 1 • Choco-Ghost House • Chocolate Island 2 • Chocolate Island 3 • Chocolate Fortress • Chocolate Island 4 • Chocolate Island 5 • Chocolate Secret • Wendy's Castle
	Valley of Bowser	Sunken Ghost Ship • Valley of Bowser 1 • Valley of Bowser 2 • Valley of Bowser 3 • Valley of Bowser 4 • Valley Fortress • Valley Ghost House • Larry's Castle • Back Door • Front Door
	Star Road	Star Road 1 • Star Road 2 • Star Road 3 • Star Road 4 • Star Road 5
	Special World	Gnarly • Tubular • Way Cool • Awesome • Groovy • Mondo • Outrageous • Funky
Bosses	Main bosses	Koopalings (Iggy Koopa • Morton Koopa Jr. • Lemmy Koopa • Larry Koopa • Wendy O. Koopa • Roy Koopa • Ludwig von Koopa) • Bowser
	Mini-bosses	Reznor • Big Boo
Enemies	Enemies & Hazards	Amazing Flyin' Hammer Brother • Ball 'N' Chain • Banzai Bill • Big Boo • Big Bubble • Big Steely • Blargg • Blurp • Bob-omb • Bony Beetle • Boo Buddy • Boo Buddy Block • Boo Buddy Swarm • Bound Fire • Bowser Statue (Gold • Gray) • Bullet Bill • Buzzy Beetle • Chainsaw • Chargin' Chuck • Cheep Cheep • Circling Boo Buddies • Climbing Koopa • Dino-Rhino • Dino-Torch • Disappearing Boo Buddy • Dry Bones • Eerie • Falling spike • Fishbone • Fishin' Boo • Fishin' Lakitu • Floating Mine • Flying Goomba • Fuzzy • Goomba • Grinder • Hothead • Jumping Piranha Plant • Jumping Pumpkin Plant • Jumping Venus Fire Trap • Koopa Paratroopa • Koopa Troopa • Koopa without a Shell • Lakitu • Lil Sparky • Magikoopa • Mask Koopa • Mechakoopa • Mega Mole • Monty Mole • Muncher • Ninji • Para-bomb • Para-Goomba • Para Mask Koopa • Pidgit Bill • Pillar • Pipe Lakitu • Piranha Plant • Podoboo • Pokey • Porcu-Puffer • Pumpkin Plant • Rex • Rip Van Fish • Skull Box • Spike • Spike Pillar • Spike Top • Spiny • Spiny Egg • Sumo Brother • Super Koopa • Swooper • Thwimp • Thwomp • Torpedo Ted • Turtle Cannon • Urchin • Volcano Lotus • Wiggler • Zigzag Podoboo
Items		1-Up Mushroom • 3-Up Moon • Berry (Green • Pink) • Bonus Coin • Cape Feather • Coin • Control Coin • Dragon Coin • Egg • Fire Flower • Gray Coin • Lakitu's Cloud • Magic Ball • Power Balloon • Super Mushroom • Starman • Yoshi's Wings
Objects		! Block • ! Switch • Arrow Sign • Bonus Block • Bridge • Coin Block • Count-Lift • Diagonal platform • Door • Dotted-Line Block • Empty Block • Fence • Flashing Shell • Flimsy Lift • Flip Panel • Flying Platform • Flying Prize Block • Grab Block • Gray Block • Gray P Switch • Hidden Block • Jump Block • Jumping Board • Key • Koopa Shell (Green • Red • Yellow • Blue) • Lift • Message Block • Naname Lift • O/X Block • ON/OFF Switch • P Warp Door • Piston Lift • Prize Block • Rope • Rotating Block • Roulette Block • Sand tide • Semisolid Platform • Single Swing Lift • Skull Raft • Snake Block • Spring platform • Star Road • Stretch Block • Switch Block • Triangular Block • Triple Swing Lift • Vine • Water tide • Yoshi Cloud
Other		1-Up Chamber • Bonus game • Bonus Star • Fall • Giant Gate • Item Stock • Keyhole • Midway Gate • Sand cloud • Time limit • Tourist Tips
Further reading		Beta elements (Advance 2) • Gallery (Advance 2) • Quotes (Advance 2)