To defeat the Sailor Senshi
When Hawk's Eye was searching Princess Rubina's dreams for Pegasus, Sailor Moon and Sailor Chibi Moon came to stop him, so he sent Elephanko and an elephant after them. Elephanko told them all about Sea Lion being her brother in law, and stories about her sister when Hawk's Eye told her to attack. The elephant walked on her, but was too heavy and cracked her head. Hawk's Eye and the elephant left through a portal, and Elephanko made Sailor Moon and Sailor Chibi Moon walk on her until Tuxedo Mask knocked her into a wall. Sailor Chibi Moon called Pegasus with Twinkle Yell, and as Elephanko assumed a humanoid form, Sailor Moon destroyed her with Moon Gorgeous Meditation.
She attacks by rolling around, as she has the appearance of a ball that an elephant balances her on.