rapscallion|rapscallions

那个小淘气鬼把糖果都藏起来开玩笑了！

That little ___rapscallion hid all the candies as a joke!

那群小淘气鬼又把老师的粉笔藏起来了。

Those little ___rapscallions hid the teacher's chalk again.

那个小捣蛋鬼总是骗孩子们的零花钱。

That little ___rapscallion always tricks kids out of their pocket money.