Pokemon GO - What are Skrelp and Clauncher, New Rivals Week Pokemon Here are the details about Pokemon GO's two new monsters. Pokemon GO’s Season of Legends. Last month saw the likes of Charge Up and Searching for Legends, and this month, joining the Tricky event and Spring into Spring event is the new Rivals Week. This event focuses on Pokemon that don’t particularly get along and celebrates “rivalries between Pokémon.” It will include a the first appearance of Therian Forme Landorus, as well as two new debuting Pokemon – Skrelp and Clauncher. But, in Pokemon GO, what are Skrelp and Clauncher and are they any good?