Waterpark Girl is a minor character who very briefly appears in Spy Kids 3-D: Game Over.
Spy Kids 3-D: Game Over
In Spy Kids 3-D: Game Over, She has hired Juni, ex-spy now turned private detective, in order to find out why the water in her water park, known as "Agua Park", is missing. He reveals that the water has been shut-down by the people who own it during the winter season. After the reveal she pays he his standard fee of $4.99.