1.Simba and Bambi have been recruited by a wizard as apprentices. Bambi had his his doubts but Simba insisted it could be fun. Not-so-secretly, they (mostly Simba) were hoping to find a way to swap species again. As such, the former lion tended to mess around with the wizard's things a lot more.
2. If you get the reference, you get a cookie.
3.Uh... well... Simba is a lion* and Bambi is a deer**... at the expense of of a filing cabinet... full of potions and other things...