I'll be listing feats in 7 categories strength, durability speed, energy projection, breathe & superscream, team attacks and other, enjoy and feel free to add.
(skip to 3:50) Feats include swimming in lava, lifting a giant meteor then melting it with heat vision and lifting a submarine.
Mojo Jojo turns his observatory atop the volcano into a floating weapons platform. Blossom grabs it and after swinging it a few times to build momentum and tosses it far out into space.
After a particularly unpleasant chain of events, the girls launch Mojo Jojo in the general direction of the Townsville city jail. Seeing that Mojo is going to land outside of the prison, Bubbles quickly pushes the building several meters to the side managing to make Mojo land in his very own prison cell. Quite the good feat, even if it is cartoonish.
The Rowdyruff Boys attack the girls by throwing a bus(Bubbles), plane(Blossom) and ship(Buttercup) in their : general direction. The Powerpuffs manage to catch all of the aforementioned projectiles and put them down without harming the passengers of the vehicles.
The Girls go out into space(for some reason wearing spacesuits, even though they can survive in space unaided) and smash into pieces of a large asteroid destroying it on impact.
Buttercup launches a giant eye monster out of earth's atmosphere. It flies beyond the Moon and keeps going without signs of slowing down.
Blossom hits a skyscraper and the higher section of the building falls, so she has to grab it and put it back in place before going back to fight a monster.