|Game||Newer Super Mario Bros. DS|
|Level type||Underground, Autoscrolling|
|Enemies||Big Piranha Plants|
|Previous level||(2-3) Switching Sewer (secret)|
|Next level||(2-) Flameburst Flotilla|
(2-) World 2- (secret)
Hydroskip Drain (or World 2-A) is the only alternate level of Crystal Sewers in Newer Super Mario Bros. DS. It's the first of three Mini Mushroom-focused levels, centering on the fact that a Mini player can walk on water.
Hydroskip Drain is unlocked by completing the secret exit of Switching Sewer. Completing its normal exit will unlock Flameburst Flotilla, and completing its secret exit will unlock World 2-.
- Star Coin 1: Once you reach the third Skeeter, jump off of it to reach a Star Coin high up in the cave.
- Star Coin 2: After the checkpoint, when the water's rising up, stay on the water instead of going into the pipe. This'll make the screen zoom out and allows you to grab the Star Coin.
- Star Coin 3: Near the end, there'll be a yellow Warp Pipe in the middle of a group of green Warp Pipes. go into this Warp Pipe, and you'll be granted the third and final Star Coin.
This level features a secret exit, which'll lead you to World 2-Cannon. After the first two Big Piranha Plants, there'll be a Brick Block in a group of Question Blocks. Hit this Brick Block, and it'll reveal a ? Switch. Quickly hit the switch, then enter the previously blocked off mini pipe. This'll lead you to the secret exit.
|Walkthrough (9:43 to 12:30)|
Secret Exit (12:44 to 14:03)
|Underground||Remixed underground theme from New Super Mario Bros..||Entire level|
- In "SlidePlayer Progress1", this level is shown with the name "Waterskip Drain".
|Areas||Levels||Crystalswoop Grotto • Pipebreak Cave • Switching Sewer • Hydroskip Drain • Wagon Way • Fliptube Tower • Tightrope Ravine • Gushing Culvert • Flameburst Flotilla|
|Other||Item House • 1-UP House • Mega House • World 2-|
|Enemies||Enemies||Big Piranha Plant • Big Swoop • Bob-omb • Bullet Bill • Buzzy Beetle • Cheep Cheep • Dry Bones • Fire Piranha Plant • Hammer Bro • Koopa Paratroopa • Koopa Troopa • Mega Cheep Cheep • Piranha Plant • Skeeter • Swoop|
|Bosses||Bowser Jr. • Mega Goomba|