Hydrocephalus
When visiting the Limited-Edition Land, you will find Walt the Hydro Whale out in the ocean. Walt loves to bring alertness for the Hydro community because he himself has it. Walt has a love for swimming and organizes the best swimming tournaments to bring alertness for his community.
Symbolically the Whale represents might, power, and is a strong silent giant. Whales can endure a lot of pressure, when they come up to the surface they can release that pressure. When battling Hydro the whale will swim next to you as a silent giant of power.