Where to Get Prism Scale Sword?

You find “Prism Scale” on Route 2, in the big lake left (west) of the Professor's House. You must first unlock the Water Bike to reach it. The Professor's house is the last building at the end of Route 2. In front of the Professor's house is a big blue carpet with a Pokeball logo on it.

How do I get more prism scales?

Starting from the Professor's house, go due west and head over the nearby body of water to an outcrop. The lootable item that you find there is a Prism Scale. Alternatively, you can also head to South Lake Miloch while you're on your Rotom bike, and inspecting every little lootable that sparkles.

Can you buy Prism scale sword?

Obtain on Route 2

In Route 2, you can get a Prism Scale in the upper left part of the lake near Professor Magnolia's house. You need to have the second Rotom Bike to traverse the water.