Oggy and the Cockroaches S02 E43 Mission To Earth

"Cats vs Cockroaches, who do you think will win?"

Oggy and Joey unwittingly catapult themselves to another planet. They later see a spaceship leading toward the invasion of Earth from aliens disguised as garden gnomes. The directive is clear and the imperative is obvious now: terminate the gnome aliens' invasion permanently and get back to Earth at once.