The Secret of Castle Mashirito (マシリト城のひみつ Mashirito-jō no himitsu) is the 101st episode of Dr. Slump Arale-chan.
Synopsis[]
Senbei finds a treasure map so he sets off to find treasure with Arale and her friends. The treasure map takes them to Dr. Mashirito's castle! Mashirito sets a lot of traps to defeat Arale!