Event 11: Yoshi's Rainbow
From SmashWiki, the Super Smash Bros. wiki
Yoshi's Rainbow (ヨッシーレインボー, Yoshi Rainbow) is the 11th solo event match out of a total of 41 in Super Smash Bros. Brawl. The player plays as the Ice Climbers on Rainbow Cruise and must KO the Yoshis in order that they appear, which mimics a rainbow: red, pink, yellow, green, light blue, and dark blue. If the player KO's the wrong Yoshi, either intentionally or by self destructing, the event ends in failure.