>>56396631>>56396641>>56396642>>56396851May has never looked 10 in ANY official media anyway. Nor she has a canon age except some ORAS stuff saying she's 12. She still looks older than that.
Ashnime and their retarded stubbornness on sticking him at 10 forced everyone to be 10 forever (and they STILL gave May a mature hourglass shape). Probably why they never added Hilda or Rosa - they look too grown up to pass as 10.