Yes Rayquaza is obtainable in Pokemon SS, however to get Rayquaza, you have to take the Jade Orb to the same cave you obtained Kyogre or Groudon within. However, to get the Jade Orb, you need to have both Kyogre & Groudon. Groudon can be caught in SS and Kyogre in HG. To activate this you must trade over a Kyogre from HG and the Groudon must be from SS. Once you have tthe two Pokémon, you only go to Professor Oak and show them to him. He will give you the Jade Orb. With it, just go to the Embedded Tower and Rayquaza will appearat the Embedded tower
- Lugia
- Ho-Oh
- Suicune
- Raikou
- Entei
- Articuno
- Zapdos
- Moltres
- Mewtwo
- Kyogre (Exclusive to HG)
- Groudon (Exclusive to SS)
- Rayquaza
- Dialga (Only after bringing and Arceus from Pokemon diamond or an Event Arceus)
- Palkia (Only after bringing and Arceus from Pokemon diamond or an Event Arceus)
- Giratina (Only after bringing and Arceus from Pokemon diamond or an Event Arceus)
- Latios (Exclusive to SS)
- Latias (Exclusive to HG)
Source (Just giving some credits to Serebii)
