The availability of higher-tier Tera Raid Battles, specifically those rated at three stars, is gated by progression within the main storyline of Pokmon Violet. These battles offer increased rewards and stronger Pokmon encounters compared to lower-star raids.
Gaining access to these raids significantly enhances the gameplay experience. The increased challenge provides a compelling objective for players. Successful completion of these raids also yields more valuable items, facilitating character progression and Pokmon training. Historically, the unlocking of such features has been a standard mechanism for pacing content and rewarding player commitment in Pokmon games.