Does anything happen when you get all of the Unown stones?

Question

In PMD; Explorers of Sky, in order to advance through Aegis Cave you need to find and KO certain Unown so that they drop an Unown-Stone.

For example, an Unown-L would drop an L-Stone, an Unown B would drop a B-Stone, etc.

If I were to collect all 28 Unown Stones (the alphabet + ! and ?), would anything special happen?

Answer 1

The Unown stones have no practical use outside Aegis Cave; stones other than C, E, I, K, L, O, R, S, T.

According to Bulbapedia, nope.