Event 4: Dino-wrangling
From SmashWiki, the Super Smash Bros. wiki
Dino-wrangling (いちおう恐竜だし, Well, I am a Dinosaur) is the 4th event match of the 51 event matches in Super Smash Bros. Melee. As an available character of their choice, the player must win a stock match against a giant CPU Yoshi on the Yoshi's Story stage with no time limit. The player starts with 3 stock and the giant Yoshi starts with one stock. Being giant (in fact, even bigger than a normally giant Yoshi under the effects of the Super Mushroom), the Yoshi is very heavy and strong; however, his AI is quite low, and often will self-destruct within seconds of beginning the event.