After you have earned the 3,000 points to obtain Landorus, you are capable of capturing even more Pokémon. However, this is done by having a Generation IV Pokémon DS game in the cartridge slot of the 3DS as you play the game. With this slot in your game, you will be able to access a new special level containing the legendary Pokémon that stars in it. The Pokémon are as follows

No. Pic Name Type Abilities Base Stats Accessed by
HP Att Def Sp.Atk Sp.Def Spd
#249
Lugia
ルギア
Multiscale 106 90 130 90 154 110 SoulSilver Inserted
#250
Ho-oh
ホウオウ
Regenerator 106 130 90 110 154 90 HeartGold Inserted
#483
Dialga
ディアルガ
Telepathy 100 120 120 150 100 90 Diamond Inserted
#484
Palkia
パルキア
Telepathy 90 120 100 150 120 100 Pearl Inserted
#487
Giratina
ギラティナ
Telepathy 150 100 120 100 120 90 Platinum Inserted