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Bubbles, an energetic and cheerful Powerpuff Girl, is the character brought to life by Kath Soucie in the animated series "What a Cartoon!" Among the three superhero sisters created by Professor Utonium, she stands out with her blonde pigtails, bubbly personality, and tendency to giggle. Soucie's playful voice captures Bubbles' infectious optimism, making her a beloved character among fans of the show.