Wiggler Stampede, is the seventh level of Soda Jungle in New Super Mario Bros. U, located outside the haunted sub-area of Soda Jungle. It is unlocked via completion of Painted Swampland or Deepsea Ruins, or via the secret exit in Bridge over Poisoned Waters and its own completion unlocks Iggy's Volcanic Castle.
This level begins in a forest area, above a pit of Poisoned Water with a Mega Wiggler in it. A tilting Mushroom Platform is found, with a ? Block above it. A Wiggler is found, along with a Mega Wiggler in poison water. A Wiggler is found on a slope, followed by another Mega Wiggler in poison water. Some tilting mushroom platforms are found above the poisoned water, followed by a platform with the Checkpoint Flag on it. A Mega Wiggler is found in poison water next to a Brick Block wall. A P Switch must be pressed, allowing the player to cross the poison water on the Mega Wiggler. Paratroopas are found, along with another P Switch. Some more mushroom platforms are found, one of which has a Wiggler on it. A ? Block is also found. The player must cross the poison on the Mega Wiggler, where more Paratroopas are encountered. Some platforms are found, along with a Roulette Block and a Wiggler. Another tilting mushroom platform and two stationary mushroom platforms are found. After crossing more of the poison water, the Goal Pole is found.
- Star Coin 1: At the beginning of the level, the player needs to bounce along a Mega Wiggler walking on the poison muck in order to reach the first Star Coin.
- Star Coin 2: Directly after the first Star Coin, there is a group of three Brick Blocks. The middle one contains a Vine that takes the player to second Star Coin.
- Star Coin 3: Towards the end of the level, the player needs to jump off a Mega Wiggler in order to safely get the coin without falling into the poison swamp.