[Or you could press B, maybe, but Winry is not going to go to that game logic.]

Everstones are great! I have one on one of my dogs, because she didn't want to evolve.

If you really want to keep her small [that's fine too], I can recommend that stone.

[A girl who's been stuck in Mahogany for weeks last time she was here, likes the idea of mass transportation more... But there's nothing wrong with keeping them small either. Better from them, for sure.]