The Downfall of Rayquaza

Rayquaza, a legendary Pokémon, was once a world-altering force, featured prominently in games like Emerald and proving its power by quelling Kyogre and Groudon. Its Mega Evolution made it exceptionally strong, winning the World Championships in 2016 and maintaining a top-tier reputation until 2019.

Mega Rayquaza possessed an incredibly broken ability, Delta Stream, which made Flying types resistant to previously super-effective attacks. It also had the highest base stat total of any usable Pokémon and an extensive movepool, including the powerful Dragon Ascent. Crucially, Mega Rayquaza was unique in that it didn't require a held item to Mega Evolve, only knowing Dragon Ascent, making it incredibly versatile.

The removal of Mega Evolution after 2019 was a significant factor in Rayquaza's decline. Without its Mega form and the move Dragon Ascent, Rayquaza lost its broken ability, 100 base stats, and its most effective attack, severely hindering its competitive viability. Despite testing in various formats, regular Rayquaza struggled to keep up with other powerful Pokémon.

Rayquaza seemed poised to benefit from Dynamax, especially with Max Airstream boosting its speed, but its weaknesses became apparent. Its primary attacks (Dragon Ascent and Extreme Speed) were resisted by common types like Rock and Steel, and its moderate speed (base 95) meant it often couldn't keep pace in the fast-paced Dynamax meta. The need for Swords Dance setup before Dynamaxing further slowed it down, and its ability Cloud Nine offered less protection than Delta Stream.

Generation eight introduced Zacian, a Pokémon that rendered Rayquaza almost entirely useless. Zacian is immune to Dragon moves, resists Flying and Normal type moves, and can deal super effective damage with Play Rough. Zacian's dominance, being the second most used Pokémon at the World Championships, made it nearly impossible for Rayquaza to succeed.

Terastallization in generation nine offered potential for Rayquaza, mirroring Dragonite's successful strategy of using Tera Normal Extreme Speed with Chien-Pao. However, Rayquaza's ability, Air Lock, makes it vulnerable to Intimidate and Fake Out, unlike Dragonite's Inner Focus. This vulnerability to Incineroar, a ubiquitous Pokémon, and its inability to effectively counter popular threats like Calyrex Ice, Groudon, and Koraidon, limited its effectiveness.

Ultimately, the video concludes that Rayquaza's downfall is primarily due to the loss of Mega Evolution. While other factors contribute, Mega Evolution provided the raw power and versatility (with Delta Stream, massive stats, and item flexibility) that allowed Rayquaza's simple, aggressive game plan to succeed. Without it, Rayquaza is simply outmatched by the current meta.