Twist the Wish

You give the world/planet peace by blowing it up and ending it's suffering.

I wish for all the birbs.

I wish for a berb

Granted both of you! unfortunately both your wishes collide and form a terrifying monster composed of every birb in the multiverse and every berb in the multiverse the monstrous Berbbirb terrorizes earth until every last living thing is destroyed.

I wish for this wish to be untwistable.

Granted! It has been folded neatly instead. 

I wish my dog would stop eating my snacks, so long as nothing bad happens to said dog and he does not die, explode, etc. The same goes for the snacks.(I can still eat the snacks though.)

Granted! the monstrous Berbbirb eats your snacks making it so the dog can’t eat them and then still hungry the Berbbirb eats you.

I wish I could pronounce Irish wristwatch.