Sorry about the possible bug. If you beat the lion tamer then the lil Hamster should have been there, ready for you to add him to your pack. Maybe the hamster spawned behind some grass or something and was hard to see? or maybe it just never spawned and you hit a game breaking bug :-( Sorry about that.
Haha yeah the narrative is admittedly a bit vague. We would have liked to add more world-building and story elements.
Thanks so much for playing and leaving feedback!