Wario World/Final Showdown

Battle
The final boss of the game awaits! After collecting all four keys from the area bosses, Wario can approach the giant treasure chest in the Courtyard to initiate the fight. The arena is a large, transparent circle with some embellishing white lines. Wario can fall off the outside edge, so staying away from the border is advised. The Evil Black Jewel floats in the center of the arena. The battle begins with five crystals—representing the Spritelings per stage—being implanted into the ground. It's the goal of the player to bash all of these crystals to stun the Evil Black Jewel. While running on the way there, the jewel will enact several attacks. The first and most commonly used is a fiery laser, that leaves a wall of fire in its place. This attempts to trap Wario inside, and then allows other attacks to be used. The walls of fire go away after a short while. Other attacks the boss might use is spewing a few flaming projectiles that whirl around the arena, and slamming into the ground to cause eight colored shockwaves to radiate outward.

Once all five crystals are broken, the boss is stunned and any ordinary Mad Move can be used to deliver damage. There will be another five crystals embedded into the ground, and the cycle of the fight resumes. This is the fight. There are no changes or developments as the fight continues, and there are merely eight skulls of damage to focus on. Once all skulls of damage have been delivered, you have beaten the game! Congrats!

Japanese Version
The Japanese version of the game was released later, and therefore features a different version of the final boss. The first four skulls of damage are identical to the fight above, except there are ten crystals instead of five. Unlike the NTSC/PAL releases, the Evil Black Jewel also shows cracks and damage as the fight progresses.

Once the fight switches, different music will play and the Evil Black Jewel will go on the offensive. It will slam into the ground to cause a shockwave—this is Wario's time to punch the Jewel to damage it—before rolling around quickly. It may charge up and dash forward as well. Any time the boss isn't attacking, it can be damaged.

Other attacks include trying to trap Wario in a circle of fire walls (before slamming into him to crush and deliver damage), or spinning around firing dozens of wooden chests to push Wario away. These chests almost all carry bombs but a few may have coins or garlic.

Just as before, using Mad Moves will damage the boss, and after eight hits the battle will conclude and Wario will be the winner.

Endings
Wario World features multiple ending screens, based off of how many Spritelings were saved over the course of the adventure. They are the following:
 * 1 Spriteling: Wario gets a tent and campfire in the middle of the woods.
 * 2-10 Spritelings: Wario gets a rudimentary wooden castle.
 * 11-20 Spritelings: Wario has a stone castle.
 * 21-30 Spritelings: Wario has a silver-laden castle...he remains unimpressed.
 * 31-39 Spritelings: Wario's castle is back to its original state.
 * 40 Spritelings: Wario's castle is fully decked out with loot, making him ecstatic.

The ending screen may be updated if the player defeats the Evil Black Jewel again with more Spritelings, but this screen is otherwise non-viewable and only serves as a post-credits bonus.