Holon Pyramid

You'll find Holon Pyramid inside the Holon Desert, south of Settlement Oscar.

In Holon Pyramid, you will end up finding the Magic Carpet item to allow for the use of Waterfall.

There will also be the opportunity to catch both Delta Riolu and Delta Torchic.

Riolu will require the password: Sekhmet

Torchic will require the solving of a puzzle, the soloution to which is "Yellow, Yellow, Red, Blue"