Jimmy Neutron: Win, Lose and Kaboom! (2004) on Netflix

Plot summary

Mysterious space rocks marked with symbols fall on planets across the galaxy, and one lands near Retroville. Cindy Vortex argues that nobody should touch it, since the Yolkians taught them not to answer intergalactic strangers, but Jimmy Neutron wants to know what the markings say. General Abercrombie seizes the stone for the military, so Jimmy, Cindy, Sheen, Carl, Libby and Goddard sneak into the base to read it. Jimmy works out the message and its riddle, and the answer teleports the group into deep space as contestants on Intergalactic Showdown, a game show hosted by Meldar. Losing teams watch their home planets destroyed, and Earth is on the line. Their first rivals are the Gorlocks.