The Perpetual Shell

“Use Boost Blocks to earn 1-Ups with the shell.”

—In-game description

Mario in The Perpetual Shell

The Perpetual Shell is a Boost Mode Challenge in New Super Mario Bros. U.

ObjectiveEdit

As in all Boost Mode challenges, one player controls the character on the television screen while the other player uses the Wii U GamePad to place Boost Blocks that will help the character. The player must stomp a Koopa Troopa and use its shell to hit as many Goombas and Goombrats as possible, earning 1-Ups while using Boost Blocks placed by the player using the GamePad as platforms. At least one extra life must be earned to complete the challenge.

DifficultyEdit

★★☆☆☆

MedalsEdit

Gold Medal: 10-Up
Silver Medal: 5-Up
Bronze Medal: 1-Up

EnemiesEdit

Names in other languagesEdit

Language	Name	Meaning
Japanese	コウラを落とさないで！！ Kōra o Otosanai de!!	Don't drop the Shell!!
Italian	Guscio inarrestabile	Unstoppable shell
Spanish	El caparazón perpetuo	The Perpetual Shell

Challenge Mode of New Super Mario Bros. U
Time Attack	Time Attack Trial • Acorn Plains Speed Run • Full Speed Ahead • Stone-Eye Desert Dash • The Boo Ballet • The Boo-Ballet Encore • Icicle Skating • Huckit Hustle • Mini Mountaineer • Lurchin' Urchins • Penguin vs. Torpedo • Slick Slopes and Bullet Bills • The Haunted Propeller • Fliprus Crossing • Rickety Sprint • No-Cash Dash • Poison-Swamp Scramble • Swing into Action • Stoneslide Tower Climb • Screwtop It Up
Coin Collection	Triple-Jump for Coins • Hot Hidden-Coin Hunt • Stingy Big Piranha Plants • Lakitu's Cloud Heist • Hot-Air Yoshi Ride • Ghost House Coin Curse • Perilous Coin Dodge • Waddlewing Wipeout • Prickly Goomba's Coinless Run • 200 Clifftop Coins • Dark Dark Coaster • Cloud-Top Coin Evasion • Attack of the Bob-ombs • Spine Coaster Coin Cruise • Castle Coin Bypass • Don't. Touch. Anything.
1-Up Rally	The Goombrat Stomp • Stone-Eye Koopas • Goomba Bounce Bash • Penguin Bowling • Three Dry Bones • Bullet Bill 1-Up Bounce • Star Connection • Big Goomba Bounce Bash • Airship 1-Up Rally • Paratroopa Panic
Special	Fire, Bro! • Graceful Glide • Mole to Goal • Marathon Glide • Bubble Up • Nonstop Flight • Be Gentle to Giants • Big Air at Sundown • Balancing Act • Bowser's Airship Sneak • Larry's Groundless Battle • No Climbing Allowed • The Trial of Bullet Bill Hill • Spin Jump, Get Dizzy • Mole to Goal Returns • Wobble and Rock • Seriously! Fire, Bro! • Elevator Out of Service • Castle Crawl • Express Elevator • Cashless Castle Crawl
Boost Mode Challenges	Piranha Plant Hideaway • Coins in the Forecast • When Waddlewings Attack • The Perpetual Shell • Boost Block Coin Stalk • Icicle Falls • Fuzzy Alert! • The High Road • Three-Legged Lava Race • Fuzzy Cliff Climb • Thwomp Castle Cash Flow • Cloudy with a Chance of Fire • Ultimate Boost Blast