[Anikrahman1995]

Rayquaza, in my opinion, has fallen out of grace in ths generation. As a sweeper, it faces stiff competition from the best pokemon in the game: Arceus. Rayquaza's bulk does not do it any favors. It will usually lose over 50% of its health from most neutral hits. Rayquaza has always underperformed in most of the teams I used it in. I could not understand why I would use it over other Dragons - Dialga, Palkia, Giratina-Oriin, Lati@s. Unlike Rayquaza, who is one-dimentonal, i.e, an offensive threat, the other Dragons can greatly contribute to the team's defensive synergy.

The release of Genesect and Multiscale Lugia is the nail in the coffin for Rayquaza. Genesect naturally outspeeds Rayquaza and can revenge kill all its sets. Rayquaza Mixed set can't do anything that a simple Life Orb SubRoost Ho-Oh cant do.

You are free to disregard what I have said. After all, our experience in using a Pokemon is likely to be different.

@Mr.lol yeah good post. I am not going to try to refute anything you said, but Rayquaza has underperformed in most of my matches as, like you already have said in this thread, Mewtwo has been underwhelming(slightly?) for you.
Let me make myself more clear: A team consists of 6 slots and I can't find an ideal spot for Rayquaza.