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Precarious Byway
Game Newer Super Mario Bros. DS
Level number 5-B
Time 400
World Moonview Glacier
Level type Snow, Athletic
Enemies Christmas Goombas
Hammer Bros. (world map)
Koopa Paratroopas (G & R)
Koopa Troopas (Red)
Snow Spikes
Game Progression
Previous level (5-Towernsmb2.png) Icecrack Citadel (purchase)
Next level (5-C) Candelabrum Cavern
(5-Final.png) Freezeflame Fortress (secret)

Precarious Byway (or World 5-B) is the second alternate level of Moonview Glacier in Newer Super Mario Bros. DS.

Precarious Byway is unlocked by completing Icecrack Citadel and purchasing a Star Coin Sign. Completing its normal exit will unlock Candelabrum Cavern, and completing its secret exit will unlock Freezeflame Fortress.

Star Coins

Star Coin 1: When Mario is at the peak of the second spinning platform in the level, jump off of it and you should land on a mostly-hidden spinning platform, where the Star Coin lies.

Star Coin 2: Follow the coins and jump into one of the Brick Blocks, which will reveal a vine. Climb this vine, then platform across the spinning platforms to reach the Star Coin.

Star Coin 3: Near the ending, you must throw a Koopa Shell into this Star Coin to obtain it.