Phineas and Ferb are thinking about the Keronian invaders that came a few episodes ago. As that happens, Perry gets a call that somehow, Pokemon are really raining down on the city while more Keronians are invading, starting with the Keroro platoon, then others. Karara comes for no apperent reason, while people are forgetting what show this is, though when ever they wonder, the theme song plays a bit. The whole episode is a secret one found only on DVD.