Today's Pokemon Presents featured the highly anticipated third trailer for Pokemon Scarlet and Violet, as well as a longer commentary trailer that discussed all the features that Gen 9 will include. There are many key elements at play in Pokemon Scarlet and Violet's fully explorable, open-world Paldea region, and one of the most compelling is the battle gimmick for Gen 9 -- the Terastal phenomenon. With Terastallization, any Pokemon in Paldea can change its type and empower the moves of that same type during a battle, with the effect lasting for the entirety of the encounter.