and i think that air bud is a dog is barely relevant to that. he didn't got to that school
Actually there is precedent. When I went to a teeny tiny borderline cultish Christian private school, we had a few sports teams but we didn't have enough students to support a soccer team, so the boys who wanted to play soccer got to join a local public school's team. There were also homeschoolers with the sports teams we did have as well as the other tiny private Christian schools we played against and a few of the public schools.
Air Bud could join the basketball team as a homeschooled player.