That scream

A yellow and green plant-like Pokémon with a wide-open mouth and sharp teeth is shown in a dark forest setting, then it lunges forward with a determined expression, its mouth opening wider as it attacks a purple, eye-like creature, causing a burst of light and energy; a woman with blue hair and a white and black outfit with a red 'R' logo on her shirt is seen in the background, then she is shown in a dynamic pose, throwing a red and white Poké Ball forward with a determined expression.