[nightmere10]

A couple of my ideas on how Tyler and Shelby meet Riley:

A: Tyler's jeep breaks down at the Griffin farm and they run into him asking for help
B: Now that Fury knows that Tyler and Shelby have the energems, he chases them down and they find refuge on the farm
C: A combination of A&B. Riley is seen finding his energem in the woods so maybe he's already practicing his swordsman skills (shirking chores maybe). While Tyler and Shelby are heading back to Amber Beach, their car gets put out of commission from Fury) and they take off through the woods where they find Riley and they take him back to his farm for shelter.