This subspecies of Metal King is said to hold within its large body a huge collection of information on the element of water. Though gender doesn't exist in the metal record species of which Metal Kings are included, it is said that there are many Water Kings which talk and act more feminine than others. It was once said that because of this they were most often encountered by men, though there's been a lot of fuss since it came to light that this may not be so. However, despite this some still believe the rumors.
Water Kings are best used as an ingredient for fusion, providing a base of 11,012 XP. When fused with Water element units, it grants 16,518 XP, not including Great Success (x1.5) or Super Success (x2). Water Kings only sells for 2500 Zel each.