Coin Monsters Spotted is a map landmark type, and on the Operation: Egg Heist map there are eight marked spots to work through. The Mountain Sanctum leads the field with three of them grouped together, putting it ahead of anywhere else on the map. After that the count thins out: the Ancient Altar holds two, the Dock Lighthouse Ruins another two, and Shipwreck Bay just one. If you want the most in a single stop, the Sanctum is the clear choice to start with.
Areas with Coin Monsters Spotted
| Area | Level | On the map |
|---|---|---|
| Mountain Sanctum | — | 3 |
| Ancient Altar | — | 2 |
| Dock Lighthouse Ruins | — | 2 |
| Shipwreck Bay | — | 1 |
The Ancient Altar is the alternative worth taking if you'd rather not commit to the Sanctum straight off, since its pair of spots sits close enough to sweep in one short pass. Whichever you pick, drop in near the marked spots and cover the ground on foot rather than looping around, as the distances are short. Keep an eye out while you work: an Exquisite Relic Chest stands within sight of about a quarter of these spots, and a Hollow Stump within sight of a smaller share, so both are worth grabbing as you pass.
Open the Aniimo interactive map to see it with every other filter, or pick another from the list.