What does the upgrade of the Mega Ring do?

Question

I'm just asking these questions. :P

Answer 1

The upgrade of the Mega Ring helps you detect underground Mega Stones, similar to how a dowsing machine detects underground/hidden items. However, the upgrade only works when sun hits the Anistar Sun Dial, or between the hours of 8-9 PM, on your 3DS time.

Answer 2

The upgraded Mega Ring allows you to hunt for the Mega Stones across the region within 8-9 hours in the evenings. If you need to upgrade the mega ring, go to Kiloude city, do a round of the battle mansion, then fight your rival (at the north part of Kiloud city), then she will tell you where to go.