Nyu's Voodoo doll

For

Like Wanda said in the Fairly Odd Parents episode, "You Doo": "YouDoo dolls (FOP's version of Voodoo dolls) are dangerous"
Specially if it's for things that could lead to serious injuries or, even, death. Timmy Turner learned that the hard way before the rocket his doll was tied on exploded with it, or the doll was chipped to bits by a machine.

In other cartoons, however, the voodoo dolls can be used for certain cartoony purposes, like Nyu is gonna show it on Rika in this comic.