Yes you can recruit riolu in crystal crossing or crystal cave
Crystal Cave or Crystal Crossing
Recruit it or get it as your partner if it's on the list of partners
Only in time darkness and sky
Yes you can recruit him in both. He is in crystal crossing.
yea
You go to the spacial rift or the sky stairway to recruit a spiritomb
The sky stairway
The sky stairway
You can recruit Aerodactyl in Sky Tower :D
In Pokémon Mystery Dungeon: Explorer of Darkness, you can find Driftloon in the dungeon that is called Sky Stairway however it wil appear randomly on floors such as Floor 31 as well as Floor 29.
I don't think you can!
Sky tower
no, u can only recruit it.
Yes you can recruit riolu in crystal crossing or crystal cave
Recruit Palkia.
its called drifloon cause it drifts