SD Gundam Force - Unknown Dangers -Vol. 4-

Trapped in a strange land! Shute is having trouble with his homework. He has to write an essay about friendship. He thinks it's going to be hard, but then he realizes that friendship is what the Gundam Force is all about. Just then, Zapper Zaku, Grappler Gouf, and Destroyer Dom invade. They, too have learned the benefits or working together and have developed a powerful new super attack. Bell Wood, meanwhile, has finished his repairs to the Dimensional Transporter, which was wrecked in a previous battle. Everyone gathers around to watch him test it, hoping that it will work. But during the testing, there's a strange accident, and Shute and the rest of the Gundam Force find themselves transported to a barren petrified world. Zero realizes that it hs his homeland, Lacroal.