100m

100m (or 100 m) is the fourth and final level of the Donkey Kong arcade game and the final level of World 0 in Donkey Kong for the Game Boy. This level is different from all the previous levels, as Mario now has to pull out the rivets attached to the steel girders holding up Donkey Kong, rather than getting to the top. To do this, he must simply walk or Jump over the yellow bolts, and they will disappear. Fires will randomly begin to appear. Fires will chase after Mario and try to kill him. Several hammers are located around the level and can be used to destroy the Fires, although more will eventually be summoned. There is a maximum limit of five Fire sprites onscreen in the arcade version and four for its NES port. In the Game Boy game, this is where Pauline's Bag appears. A related stage appears on the Game Boy Advance remake, which is shorter.

Once Mario has disabled the eight yellow rivets (six in the Game Boy version), the middle girder will collapse, and Donkey Kong will fall down to the bottom, banging his head on the ground. Mario will rescue Pauline and a heart will appear. In the arcade version, the game ends here and repeats itself. All following levels with have 100 added to their number, starting with 125m, despite being the same as 25m. In the Game Boy game, Donkey Kong will stand up again and grab Pauline again. He will then escape with her into the Big-City, with Mario following the two.

Enemies

 * Fires
 * Donkey Kong (boss; final boss in arcade version only)

Pauline's lost items
Within this stage, Pauline's lost items can be found in the following order and in the following places: Note: The Bag is on the second girder on the left near the Rivet, while the Hat and Parasol are absent in the Game Boy version.
 * Bag: On the lowest girder pass the Ladder in the middle.
 * Hat: Under the ladder on the second girder on the right.
 * Parasol: On the highest girder where Donkey Kong stands on the left.

Cutscene after level completion (GB version only)
After the level is completed it plays out just like the arcade version except instead of ending, Donkey Kong gets back up causing the ground to shake, breaking the girders Mario and Pauline are on which causes them both to fall. Mario just hits the ground but Pauline gets caught by Donkey Kong who makes an escape with Mario chasing after him. The scene then cuts to Donkey Kong running into an open Door, Donkey Kong closes and locks the door just before Mario could enter it causing Mario to crash into the door and get dizzy, then the Key falls from the sky which Mario then grabs it and takes to the door to unlock it then he runs in and the cutscene ends. The player is then given lives based on their score.

Trivia

 * A glitch in this level allows Mario to "taunt" Donkey Kong. If Mario stands next to him and jumps, he is awarded 100 points per jump. Touching the gorilla is fatal, and the exercise serves no purpose unless the player jumps twice per second, as the timer removes 100 points per second wasted.
 * Another glitch can cause a Fire to get stuck between two platforms if Mario removes a rivet underneath the enemy as they are programmed not to fall from platforms.

100m