The only way to beat the giant Beta is via direct attack to the brain, forcing Ogre into a very perilous situation. Auctioneer risks his life to locate the brain, and Ogre uses Number 11 to take it out and defeat Beta.

He reunites with the Squad and celebrates, but his joy would be short-lived.
I used every second of what
little time I had to destroy him!
استعملتُ كلّ لحظة من وقتي المحدود 
!للسعي لهزيمته
Ich habe jede Sekunde der wenigen
mir bleibenden Zeit aufgewendet, um ihn zu besiegen.
Yo usé todo mi limitado tiempo
para derrotarlo.
Yo usé todo mi limitado tiempo
para derrotarlo.
J’ai utilisé tout le temps
qui m’a été donné pour le vaincre.
Io ho usato tutto il mio tempo limitato 
per sconfiggere quel tipo!
Usei cada segundo do pouco tempo
que tinha para poder destruí-lo!
Я потратил каждую секунду своей
недолгой жизни на уничтожение Беты.