No, you can get it on V4.5, cos V4.5 is just the English UraTama.
Anyway, there is no guarantee on V4.5 that you will get the character you want. Toddler --> teen growths are very unpredictable. My suggestion would be to take good care, because on non-Ura tamas Mametchi is thought to be perfect care... But you may well get something different. So don't blame me if this doesn't work.
EDIT: I do know something. It must be a boy.