Big Wave is what its name implies - a gigantic wave of water that smashes into everything on the field. This technique is first seen used by Zeto. For Zeto to perform the Big Wave technique he must first use Call Wave. However, the Lv. 2 and Lv. 3 variations of the Seru, Slippery, can perform Big Wave randomly without the use of Call Wave - this makes them far more dangerous.