She is a friend of Jimmy and helped him, Vincent, and Eusine, called Eugene, save Raikou from Attila and Hun. When Team Rocket attempted to steal Raikou, they accidentally kidnapped Marina. Marina swiftly opened the door on the truck and told Raikou to jump to freedom while she stayed behind. Later Jimmy called her PokéGear to see if she is okay, but only heard Attila and Hun crushing her phone. They later tied her up, which made Vincent angry. She was released, and joined Jimmy, Vincent and Eusine in their attempt to free Raikou from the crystal's grip. Once Raikou was freed, it ran off into the wild, leaving the trainers to continue their respective journeys.
Wani-Wani was Marina's starter Pokémon that she received from Professor Elm when she started her journey. It first appeared in The Legend of Thunder! as a Croconaw to battle Jimmy's Typhlosion, though was easily defeated, despite the type advantage. It then made a cameo in Pokémon Ranger and the Temple of the Sea in the opening credits. It made its final appearance in A Stand-Up Sit-Down as a Feraligatr on an internet broadcast explaining double contest performances. Its known moves are Water Gun and Aqua Tail.
Little Miss is one of Marina's favored Pokémon, as seen by the fact it is often seen out of its Poké Ball. It seems decently strong, being able to hold itself against Attila and Hun. Its known moves are Perish Song and Psybeam.
Little Pink is one of Marina's Pokémon that first appeared in The Legend of Thunder! to battle Jimmy's Beedrill. It seems to be used for its cuteness in contests and appeared in A Stand-Up Sit-Down with Wani-Wani as its partner in a contest broadcasted on the internet. Its known moves are Sing and Psychic.