War of the World's Cup! / Friend Him Like Beckham

Inspired by watching World Cup soccer on TV, Keroro plans on pitting the superior Keronian forces against the best Earth has to offer - on the soccer field. Answering this challenge on the planet's behalf is Paul Japan, a team of top soccer players handpicked by Paul to defend the pride of soccer as a human sport.
Tamama makes friends with a boy he sees practicing his soccer moves everyday. He joins the boy in his daily routine, and even teaches him his trademark Jealousy Ball, adapted for soccer into the Jealousy Shoot - which destroys the boy's old soccer ball by accident. Fortunately the vast resources of the Nishizawa Peach Group fix the ball exactly as it was. Eventually, the boy learns to shed his defensive mindset and play better than he ever could, and Tamama has someone he can truly call a friend.