Hippo Iron

The Hippo Iron (ヒポアイアン Hipo Aian) 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 pink hippo with a long tail, spots, long fangs and a pig-like snout.

Keeping its twin tusks hidden, this crafty hippo-beast pretends to be harmless. Hiding the huge fangs inside its mouth, it deceives its prey.