The West Crater

The West Crater is a level located in the west side of the Music Box World in Wario Land 3. It's only accessible after the volcano erupts when Wario uses the three conch artificats. It is unlocked along with The Colossal Hole.

The treasure hunting takes place inside the volcano. This level has Fire Robotas, Hammer-bot and has flames that blocks the way to the upper-left which can be pulled out using the Fire Drencher found in Above the Clouds.

Grey Chest : Blue Snake Eye (left)
To get the gray key, Wario has to go to the bottom of the level and use the Fire Wario form to break the blocks to the right and manage to get the key.

Then, he has to come back to the upper area and make his way to a door by breaking walls. Then he has to use the Ball o' String Wario to break the string blocks and finally open the chest to get the left eye of the blue snake.

Red Chest : Saber
To get this treasure, Wario must have the Steel Overall from the Castle of Illusions. First, the player has to enter the door behind a wall to the left side of the main area. Here, Wario will find a Silky. He has to grab him and use him to break solid blocks that blocks the way to the top of the room where the red key is. After getting the key, Wario has to let the Silky turn him into a Ball o' String Wario which allows Wario to break the string block and reach the bottom of the level.

Here, Wario must use his ground-pound to break the blocks on the warp pipe and enter it. He will then find himself on a carriage, just like the one found in The Volcano's Base. The player has to guide Wario carefully because there are flames in the carriage's way. When touched, Wario will become Hot Wario and he has to restart again.

When reaching the end of this area, Wario must simply go down the ladder and open the chest.

Getting the Saber doesn't effect the Music Box World in any way.

Green Chest : Castle Brick
To get this treasure, Wario must pull out the flames using the Fire Drencher found in Above the Clouds. Then, he has has to use the path that was blocked by flames and enter a new door. Here, Wario must use the platforms to get the Green Key and the Green Chest (Wario sometimes needs to duck to jump from a platform to another).

This treasure opens a new path in Castle of Illusions.