Amy woke up, unable to talk thanks to the newly collected Engine Core. It was a good thing too, because Sonic was sure he couldn't stand another second of Amy talking. However, she was able to use sign-language to say that she would help them, even though they all knew she would sacrifice the world for Sonic. That's what Sonic hated about her. It wouldn't really cut it to say that Amy wasn't his favorite person, but if she was now willing to save the world, he figured it would be okay to let her help. The problem was that Amy was so slow; she could never keep up with Sonic. She would be more of a burden than a help.
Sonic moved on to give Tails the orange Engine Core, which turned out to have fire abilities. Meanwhile, Silver was whispering something in Shadow's ear. Shadow nodded to whatever Silver told him. Fortunately, Shadow was very good at keeping secrets, as he had been doing so for a long time.
"Rouge, you'd better not have the Master Emerald."Knuckles growled to himself, rubbing his fists together in anger. Amy was lying in a corner, grumping as well. She couldn't fight, and she couldn't work as an operator, either. Even if she could talk, Sonic wouldn't want her to, and they would start working the mission backwards. Sonic felt sorry for her, but she really deserved it, just like Eggman deserved what was coming to him. Then he remembered the mission in the first place.
"C'mon, guys, let's go!" Sonic shouted to Knuckles and Shadow. And they came up on his sides.