Allister is the youngest gym leader there is he's eight years old, an gym leader, and homeschooled, so who is it that takes care of him? Your first thought might be Bea, but you got to remember she is busy with her own work as a gym leader, and her own stuff in her own life. No Allister has a mother. Teresa is Allister's mother; she spoils the life out of that boy, but can you blame her he's her baby boy ( or, try's to ). Teresa has been gone do to a family emergency in the Kanato region, but she's home.