Original Japanese Title: "That's Primitive!"
Beyblade Top Debut(s): Hopper (gray-colored version).
This episode debuts another new Beyblade anthem, "Hang On" by Chris Szczesniak & Mike Dungann.
This episode first aired on Toon Disney's Jetix block in the US.
Cartoon Network (UK) airdate: September 11, 2004.
The place that Kai, Ray, Max, and Tyson met is called the Earth's Belly Button because that is what it looks like from the air, a belly button.