Giant Donkey Kong

Giant Donkey Kong is a boss in the first 3 Smash Bros. games

In Super Smash Bros.
In 1P game, Giant DK appears on Stage 6.

In Super Smash Bros. Melee
In Melee, Giant DK appears when Donkey Kong gets a Super Mushroom, and also on Event 25: Gargantuans

In Super Smash Bros. Brawl
Giant DK appears in certain Event matches: "Event 9: Monster Beneath the Earth", "Event 22: Monkeys Unite", "Event 27: Three-Beast Carnage", & "Co-Op Event 14: The Dark Guardians"