Although a remake of the original Generation IV games, Pokémon Brilliant Diamond and Brilliant Pearl introduces a number of new features. One of the most notable features included in the latest games is the introduction of Ramanas Park. The new location is home to several Legendaries in the game, and players wishing to add those Pokémon to their collection will need to unlock Ramanas Park.
To unlock Ramanas Park, you must defeat the Elite Four and acquire the National Dex. Bottom line, Ramanas Park is post-game content and you won't be able to catch the legendaries there until the very end.
Ramanas Park is located south of the city of Sandgem. Once you arrive, she speaks to the receptionist and she will provide you with a list of all available whiteboards that you can purchase. Each Board costs 1 Large Mysterious Shard or 3 Small Mysterious Shard and triggers a specific Legendary encounter. The legendary Pokémon that can be encountered in Ramanas Park are the following:
- Discovery Slate: Regice, Regirock and Registeel
- Kanto Slate (SP exclusive) - Articuno, Zapdos and Moltres
- Management Slate (BD exclusive) - Entei, Raikou and Suicune
- Soul Slate- Latios e Latias
- Rainbow Slate (BD exclusive) - Ho-Oh
- Squall Slate (SP Exclusive) - Lugia
- Ocean slate - Kyogre
- Tectonic slate- Groudon
- Stratospheric Slate - Rayquaza
- Genome Slate - Mewtwo
- Distortion slate - Giratina
With the exception of Giratina, you can catch all summoned Pokémon using slates. Although Distortion Slate triggers the Battle of Giratina, it can only be defeated and not captured. However, once the Pokémon is defeated, you will get Griseous Orb as a reward.