Luigi's Mansion 2Edit
Rocko, taking the role as the main antagonist, went on a mission given by his father, Bowser. Rocko's mission was to capture both Princess Peach and Princess Daisy and create obstacles to stop Mario & Luigi from rescuing them.
Luigi's Mansion 3: The Room of DOOM!Edit
Rocko appeared in Luigi's Mansion 3: The Room of DOOM! as a supporting antagonist and teamed up with his brother, Ronald Koopa, to come with ideas to stop the Mario Bros. from rescuing Princess Peach.