Super Bell Hill

Super Bell Hill, otherwise known as World 1-1, is the first course of Super Mario 3D World and the first course of the bonus episode in the Wii U version of Captain Toad: Treasure Tracker. Similarly to the World 1 map in Super Mario 3D World, the course takes place on grassy plains surrounded by water. Within the level, players can find grassy fields, small ponds, Super Bell-shaped trees, and a white wooden bridge. It is unlocked from the beginning and its completion unlocks Koopa Troopa Cave (in Super Mario 3D World).

Layout
The level starts on a grassy field, with a set of white stairs that leads to a Goomba and a ? Block. To the right is a Clear Pipe, which leads to an area full of Goombas and another ? Block. Afterwards, there is a second Clear Pipe that leads to another set of Goombas and a wall that can be climbed with a Cat suit, with a series of hills as an alternate path.

Following this area are two Clear Pipes, one of which brings the player to the Checkpoint Flag. This leads to a tree with a Super Bell, and a hill with a giant Rabbit that has a Mega Mushroom. Nearby is a pond with another smaller rabbit and a Warp Pipe. Past the pipe is a Cat Goomba, a series of Brick Blocks, and a white wooden bridge with stone blocks seen directly past it. A tunnel nearby contains wooden crates, and a passage under the bridge that has a 1-Up Mushroom. After this, a Clear Pipe leads the player to the Goal Pole.

Green Stars (Super Mario 3D World)

 * Green Star 1: Near the beginning, players will find a Clear Pipe. Through the top route of the pipe, players will find the first Green Star.
 * Green Star 2: After the checkpoint, there is a Rabbit that circles around a small pond. When caught, it offers the second Green Star.
 * Green Star 3: The player needs to use the Mega Mushroom from a big Rabbit on a hill close to the Midway Point. The player must smash the stone Blocks directly after the white bridge to reveal the third Green Star.

Stamp (Super Mario 3D World)

 * Near the midpoint lies a Warp Pipe that leads to a room containing the course's Stamp. The stamp is Cat Mario.

Bonus Objective (Captain Toad: Treasure Tracker (Wii U))

 * Collected the Gold Mushroom!

Luigi sighting
After dropping out of the Clear Pipe near the Checkpoint, the player can visit a Sprixie with a pair of binoculars who will show them the direction of the Goal Pole. In this binoculars view, it's possible to make out a tiny Luigi peeking over the fence across the yard to the right of the screen.

Appearance in Captain Toad: Treasure Tracker
In the Wii U version of Captain Toad: Treasure Tracker, Captain Toad can play this level in the Bonus Episode. The level is mostly the same, with a few added ladders, ramps, and Empty Blocks, as Captain Toad cannot jump.

Luigi sighting
After the Clear Pipe Cannon, an 8-bit Luigi can be seen next to a ladder across the yard. But, like in Super Mario 3D World, it disappears when Captain Toad gets close.

Enemies

 * Goombas
 * Cat Goombas

Trivia

 * The music for Super Bell Hill can be played on the Mushroom Kingdom U stage in Super Smash Bros. for Wii U and Super Smash Bros. Ultimate.
 * An arrangement of Super Bell Hill's music appears as one of the selectable songs for the Rhythmic Gymnastics event in the Wii U version of Mario & Sonic at the Rio 2016 Olympic Games.
 * Super Bell Hill was used as a test level in an early build of Splatoon.
 * Super Bell Hill appears in the background of the overworld theme in the Super Mario 3D World game style for Super Mario Maker 2.
 * In the beginning of the level, the player can see the rock that appears near the beginning of World 1. After the game is completed, the rock is replaced with a rocket ship, and if the level is re-entered, the rocket ship can be seen where the rock was.
 * The level has a unused pool of water that is invisible.