I did it (like another member here)!

The most worth Sta spent ever!
Yes, I tried 2 more times, for 0 result.
On the other hand I get one in the 50 Sta stage... With the one I already had, and the one I get previously today I was finally able to make Bipina Evolve... but I need 3 more to Evolve Edelweiss next week, that's why I try again and again...

Anyway thanks for the info (10%), Eab1990, but that's so low...