|“You haven't bought any skills yet. Here. See my skill tree. See? I have Level 48 stamina. And I have enough experience points to buy another skill.”|
|— Beta Jay 137, "Superstar Rockin' Jay"|
The Ninja used credits to buy apples guns and Ropes of Questionable Integrity.
The Ninja used some of their credits to participate in the Speedway Five-Billion, but were a couple of credits short, as Kai used his to buy a Avatar.
Later, after Jay and Nya won the dance off, they earned five hundred credits.