Things You'll Need
Instructions
Speak to Warden Baoba at the Safari Zone. He will ask you to catch a Geodude with Safari Balls. Place the Geodude in the first slot of your Pokemon roster and speak to Baoba to complete the first quest.
Talk to the warden again. He will ask you to capture a Sandshrew from the Safari Zone. Place Sandshrew in the first slot of your Pokemon roster and speak to the Warden again to complete the second quest.
Speak to Baoba again to collect six decoration blocks from him. Over time, Baoba will give you more blocks until you get all 24 of them.
Select the Meadow part of the Safari Zone and begin decorating it with blocks. Put down 10 Forest blocks and 14 Rocky blocks.
Return to the Meadow after 70 days. Wander the area until you encounter a Riolu. Throw as many Safari Balls as possible to capture it.