Jigglypuff
The Super Smash Bros. games eventually had an overwhelming number of characters. But the first round for the N64 has a fairly manageable roster. There were only 4 bonus characters to unlock, and the first one you got was Jigglypuff the Pokemon. At first, not exactly much to get excited about. But if you could pull off Jiggly’s special Up-B sleep song, followed by his Down-B rest attack beside your opponent, they’d go flying. It’s a devastating one-two combo from the pint-size prince of puff.