Fidelito proves his loyalty by helping trap the Keepers in their compound with salt bags and by going to the bone yard with Ton-ton to rescue Matt and Chacho. Fidelito’s loyalty is so shocking to Matt and the other Lost Boys because he is so small, timid, and obedient of the keepers. They did not expect him to be brave enough to help trap the Keepers and escape from the plankton factory. The author writes, “‘What about the Keepers?’ Matt said. ‘Isn’t he afraid they’ll catch us?’ ‘Not a chance!’ Fidelito wriggled with excitement. ‘They’re locked up in their compound. The doors and windows are covered with bags of salt-mountains and mountains of salt! All the boys helped.’” Fidelito coming to the Bone yard to rescue Matt and Chacho and helping