When Lupin turns into a werewolf and you have Buckbeak and your battle with Lupin begins, the order will always be this: Buckbeak, Lupin, Hermione, then Harry Potter (or Harry Potter then Hermione). What you have to know is that Buckbeak's attack is the only one that can get past "3" damage (your spells are worthless). Also, Lupin only attacks Buckbeak. When Buckbeak is unconscious, you have lost and have to start over with full everything in the Hospital Wing. Go back outside and go back to the lake (near the Whomping Willow) where you have to face Lupin again. If you want to beat him your first time, here's what you do: make sure that you have at least two of each card in the card combo called "Replenish SP." Whenever Buckbeak's SP is btw. 100-200, use that card combo. With Hermione, just use Flipendo on Lupin for 1-2 damage, as to not waste your magical power (as well as with Harry until Buckbeak is between 100-200 SP). Slowly and steadily, you'll beat him with Buckbeak.
