Question

How many boys come to beat ender up in the shower? how does ender control the situation so he only has to fight one?

Answer 1

Bonzo as the leader and seven other boys arrive in the shower to fight Ender. Ender then uses his intelligence to gain the upper hand given his situation by challenging Bonzo to a stand off.

Step-by-step explanation:

By challenging Bonzo this way, Ender gains the high ground of the fight since Bonzo has to respond to this or back down in front of the others, proving that Ender has control over him.

Answer 2

It is from the novel "Ender's Game", chapter 12. Seven boys and Bonzo as their leader beat Ender up in the shower. Later Ender trips Bonzo and plays with his mind. At the end of the chapter, Ender kills Bonzo.