Ep. 37: Der Ninja will auf der Burg angeben, Deco!

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The gang feels lucky to obtain another Deco Stone as the Deco Bus is taking them back to Jewel Town. When they set foot in it, their clothing transformed into ninja clothing. At the top of the castle, there are three Jewelpets who were watching their every move: Chite, Yuku and Nix. They form a group called the NEET Triangle, and decide to spy on the others until Coal interrupts. With none of their tricks work on them, Yuku decides that they should reveal themselves. (Source: Wikipedia)