Luka's first appearance was in the episode Mantine Overboard!. She was trying to find the Silver Wing like her great-grandfather before her. With the help of Ash and his friends, she successfully recovered the Silver Wing which had been lost when her great-grandfather's ship sank many years before. She then offered to give Ash, Misty, and Brock a ride to Red Rock Isle on her boat.
| Luka sent out her three Magikarp to help her and Ash find her grandfather's lost treasure and sunken ship. When they found the ship, she sent her Magikarp to investigate it. However, a wild Mantine appeared and scared them all away, frightening them considerably. They were later used when Luka went down with Ash, Misty and Pikachu.
None of Magikarp's moves are known.