Ash and co. continue their journey to Icirrus City, but to get there they have to cross over one humongous obstacle: Twist Mountain. There they meet a Pokemon Archaeologist named Ferris and his friend from childhood Sierria. Apparently Ferris has dug up a Cover Fossil, which is that of the Prototurtle Pokémon Tirtouga. But is Ferris the only party interested in the fossil? No, but not for long until Team Rocket had taken the Cover Fossil away into their helicopter as Ash and Ferris goes on after them.