Battle Arena Pad
From the Super Mario Wiki
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Battle Arena Pads can be found around the levels of Donkey Kong 64. Each level usually contains only one pad, though the game's overworld, DK Isles, contains two. During gameplay, the five Kongs can use these metal platforms, after finding them, to teleport to a small arena, though this is completely optional. In this arena, one of the playable Kongs will be greeted by several members of the Kremling Krew. Trying not to be attacked by these enemies or knocked off the stage, they will need to defeat some of the foes. As the battle progresses, a timer, displayed at the top of the screen, will run, and once it hits zero, the battle will end. If the monkey did not get defeated by the endless number of Kremlings, he or she will be given a golden Battle Arena Crown, one of the keys to beating the game 101%. After the player finishes the battle arena, the Battle Arena Pad will disappear.
Battle arenas can also be played in the game's multiplayer mode Kong Battle, where the player(s) must battle each other to the finish until there is one Kong standing, all the while dealing with various enemies and using power ups against the opposing player.
List of Battle Arenas
Bish Bash Brawl
More Kritter Karnage