When Harper and Sarah tell Lana that a Pokémon saved them after they got lost in the woods, Mallow remembers the same thing happened to her and Lana when they were younger! The two friends decide it’s time to find this Pokémon, nicknamed Grandpa Forest, and offer it their thanks. Always up for an adventure, Ash and Pikachu tag along, too! Our heroes soon learn that Grandpa Forest must be a Drampa, and when they find its favorite bittersweet Haban Berry trees, they realize they’re on the right track. Then, after a brief scuffle with Team Rocket, Lana and Mallow joyfully reunite with their old friend!