The Steep Canyon

The Steep Canyon is a location found in the south part of the music box world in Wario Land 3. This area is accessible after both the Yellow Book from The Tidal Coast's Gray Chest and the Trident from Bank of the Wild River's Gray Chest are acquired by Wario, where both are used to create a storm to opens the path to this level.

The level is a big canyon, with currents at the bottom. A cave can be accessed through a fissure from the tremors caused by the Foot of Stone, and another cave is past the iron wall that requires the Rust Spray to bypass.

Gray Chest: Grab Glove
The Grab Glove  (or Grab Gloves ), also called the Glove with Superpower, is in the Gray Chest. It is available from the start.

To get to the Gray Key, Wario must go up past the Fire Robota, then smash the rocks to the right, and then go down to break the rocks to the left, and then down to the platform. From there, he must go all the way to the right, where there are Water Hands under some of the platforms. The key is near the iron wall.

From the Gray Key, Wario must go upwards, and then to the left-leaning slope. On the way to the left, there are three Fire Robota and a Prince Froggy, as well as two gaps that must be jumped over.

The Grab Glove allows Wario to grab small enemies, allowing them to be carried to a different location and also can be used to throw at Enemy Blocks to break them. This opens the way for new treasures in The Tidal Coast, The Frigid Sea, and The Big Bridge.

Red Chest: Tusk (red)
The Tusk (red) in the Red Chest requires the Foot of Stone from The Tidal Coast's Red Chest to create a fissure in the wall in this level.

The entrance of the fissure is past the left set of Water Hands but before the right set, where the platform requires going around by breaking the blocks to the right, then go up, and then going left to reach the entrance. Within the entrance, the room has several Pneumos. The Red Key is below the Warp Pipe, accessible by triggering Puffy Wario and then reaching it by either going to the platform above to fall towards it or to float up towards it.

From there, the Red Chest is reachable by going through the gaps towards the right with Puffy Wario. The first gap is towards the top of the rocks, the second gap is in the middle of the rocks, while the third is in the middle of spikes before the Red Chest.

With this Tusk, along with both the blue Tusk from The Volcano's Base's Blue Chest and the Green Flower from The Stagnant Swamp's chest are obtained, their power causes the volcano in the center of the world to erupt. This causes both The Colossal Hole and The West Crater to be accessible.

Green Chest: Telephone
The in the Green Chest requires Frog Prince's Glove from Out of the Woods' Green Chest.

To get to the Green Key, first the room within the fissure must be entered by Wario, and then swim through the current underneath the Red Chest to reach a Warp Pipe. Within the pipe, Wario must climb to the top by climbing the ladders and springing the Togēba up in the air to use as platforms. Atop this room, there is a Green Chest and another Warp Pipe. The pipe leads to a maze of spikes, which the owl is required to navigate through. The maze of spikes also have sparks scattered throughout. To get to the Green Key, the owl must be navigated through the middle to the left to reach it.

To exit the area, the Warp Pipe at the left must be entered since the one on the right is one-way. From the Green Key, Wario must go around the body of spikes in the middle by either going left and then down, or down, up-left, left, then down. The pipe leads to the room with Pneumo, where Wario will emerge where the Red Key is. From there, he must make his way to the Green Chest by going to the Warp Pipe past the current, and the climbing the ladders and Togēba in this area.

The Telephone does not affect the world in any way.

Blue Chest: Blue Chemical
The in the Blue Chest requires the Rust Spray from Castle of Illusions' Blue Chest, which is used to spray at the then-indestructible iron wall to make it rust, and consequently destructible.

The iron wall is on the other end of the body of water. There are three areas past the iron wall: the first one has both the Blue Key and the Blue Chest, but it is blocked by two breakable blocks in a narrow passageway. It also has three Spearheads. The second area consists of flame torches where only the middle one is lit and Para-Gooms. It also has a Flame block that requires the other three torches to be lighted up to bypass. The third and rightmost area consists of two Beam Robota and a mini-game block. To get to the Golf minigame, the floor slighty to the right of the Beam Robota must be destroyed with a Smash Attack to get to the entrance. After clearing the Golf minigame, the mini-game block opens the way to a left leaning slope, which is required to break the blocks in the first area by rolling from it to travel across three areas. After the blocks are broken in the first area, the Blue Key is accessible.

The Blue Chest is directly below the Blue Key.

This treasure, along with the Red Chemical from Beneath the Waves' Green Chest, causes the ground beneath the heavy blocks in The Vast Plain and Beneath the Waves to soften, causing them to sink and open the way to the respective levels' new areas.

Enemies

 * Fire Robota (7)
 * Water Hand (7)
 * Prince Froggy (1)
 * Pneumo (5)
 * Togēba (2)
 * Spark (9)
 * Spearhead (3)
 * Para-Goom (3)
 * Flame (4, 3 without fire)
 * Beam Robota (2)

Reaction abilities in this level

 * Hot Wario (via Fire Robota or flame)
 * Puffy Wario (via Pneumo)