When you start Box 2, do Creatures from Box 1 stay in the pool for enemy selection?

Question

Accepted Answer

Yes. Creatures from earlier boxes join the pool for later boxes, along with the new Creatures and the named enemies from the encounter cards, and enemies are drawn randomly from that pool.

Harry Potter: Hogwarts Battle

When you start Box 2, do Creatures from Box 1 stay in the pool for enemy selection?