100m

100m is the 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. To do this he must simply jump over the yellow bolts and they will disappear. Donkey Kong will make Foxfires appear by beating his chest. Foxfires will chase after Mario and try to kill him. Several hammers located around the level which can be used to destroy the Foxfires, although more will eventually be summoned. There is a maximum limit of five Foxfire sprites onscreen in the arcade version and four for its NES port. In the Game Boy game, this is where Pauline's Bag appears.

Once Mario has disabled the eight yellow rivets, 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.

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 Foxfire to get stuck between two platforms if Mario removes a rivet underneath the enemy as they are programmed not to fall from platforms.