Rillaboom is a Grass-type Pokémon introduced in the eighth generation of the Pokémon series. It is the final evolution of Grookey, one of the starter Pokémon from the Galar region. Rillaboom is known for its strong connection to nature and its ability to control plant life. It has a large, drum-like tree stump that it uses to create powerful sound waves. Rillaboom has a unique ability called Grassy Surge, which creates a grassy terrain when it enters battle. This terrain boosts the power of Grass-type moves and heals Pokémon standing on it each turn. Rillaboom is recognized for its high Attack stat, making it a formidable opponent in battles.