WHY WOULD YOU GET RID OF A PSEUDO-LEGENDARY!? ASH, SHIT LIKE THIS IS WHY YOU CAN'T WIN ANY LEAGUE TOURNAMENTS!
To be fair, he is an immortal-he can visit her(?) anytime. To be even fairer, adding so many unused Pokemon at Oak's ranch will cost him a lot...already counting Snorlax and a whole Tauros herd to feed.