Seiuchi Mountain

The Seiuchi Mountain, or Walrus Mountain, is a creature developed by Dr. Indigo using the chemical SIQ for Shiki's plot to use monstrous creatures to attack East Blue to force the World Government to submit to him. It is a giant walrus in cyal and blue.

Trivia

 * The Walrus Mountain is similar to a species of Pokemon called Walrein, since they are both blue and are walruses.