Event 7: Diddy Kong Panic
From SmashWiki, the Super Smash Bros. wiki
Diddy Kong Panic (ディディーコングパニック, Diddy Kong Panic) is the 7th solo event match out of a total of 41 in Super Smash Bros. Brawl. In this event, the player plays as Donkey Kong, facing off against 15 miniature Diddy Kongs. The event is held at the Mario Circuit stage. It is similar to Super Smash Bros. Melee's event matches, Event 22: Super Mario 128 and Event 24: The Yoshi Herd.