Why do my buried spheres disappear after being buried in the Sinnoh underground?

Question

I’ve discovered something a bit strange, and I wanted to ask. When I bury spheres, on my Platinum, they seem to completely disappear after being buried for a while. While I just bury them To get the raised chances of finding more bulging spots on the walls, I’m still curious as to why they seem to disappear from the ground after a while. Does anyone have an answer as to why please?...

Comments

This happened to me if I buried too many of them. Is it possible you buried too much?

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Did someone else steal your spheres?

Answer 1

Only 100 spheres can be buried at a time. Attempting to bury more causes the oldest sphere to disappear.

Spheres (Bulbapedia)