The three protagonists wear very short skirts. Also when transforming, the girls practically become undressed to briskly be dressed once again, but none of that is clearly shown.

The Rowdyruff Boys lower their pants, showing their butt, in order to fart on the Powerpuff Girls. (uncensored version only)

Buttercup says you guys are simps in ep 51 but she actually says you guys are a cinch

Sedusa wears a tight outfit that reveal a large amount of her breast.

Wuss is used.