Father, Interesting Twin Brother and others in “Unfinished Business”

[on the phone] Hello, my children. I have an assignment for you. So listen carefully. One of those meddlesome Kids Next Door shall be visiting her homeland. Once there, she plans to rendezvous with the secretive Japanese Kids Next Door. Your mission is to track the operative until she leads us to the Japanese Kids Next Door headquarters, then send their coordinates to my formidable ninja army. Contact the ninja only when you are certain you've located the Kids Next Door lair. Ninja charge by the hour, and I'm not made of money. You got that? I have handpicked you because you are my most skilled agents, my most foolproof villains, my most relentless trackers, and above all, my most devious masters of disguise.

Rest assured, Father. The Interesting Twins…

…From Beneath The Mountain…

[in unison] …Are twice as good as you require. Failure is an impossibility.