Off to Mobius
Flynn-Fletcher house: The backyard
The heroes are waiting for Shadow's return with Silver when an unexpected guest turns up.
"I need to see Phineas and Ferb! It's an emergency!" Irving said.
"What's the rush, Irving?" Phineas asked.
"Okay, more importantly, I need to find Knuckles the Echidna, I turned to you since I thought you might be able to help." Irving replied.
"You talkin' about me?" Knuckles asked.
"Well, I ran into a friend of yours, and his name was Mighty." Irving said.
Then an armadillo comes into the backyard.
"Hey Knuckles, how have you been doing." the armadillo said.
"Hey Mighty, great to see ya, buddy." Knuckles greeted his friend back.
"Care to introduce yourself?" Ginger asked.
"Oh yeah, I've known Knuckles when I worked for the Chaotix with him." Mighty said. "When I came to this world, I met Irving, he decided that Phineas and Ferb might be able to help me find Knuckles, we were looking for you, but now here we are."
"And my guess was right." Irving said.
"And now we just have to wait for Shadow to come back with Silver." Blaze said.
Danville: The abandoned mine
Silver still has Ifrit paralyzed.
"You will release the Ifrit so that the master's goal can be accomplished." Phi said.
"No! I won't let him ruin the future." Silver says defiantly.
"Silver the Hedgehog is showing extreme signs of resistance, terminate Silver." Shadow Android said.
"Acknowledged." Metal Sonic replied.
Silver continues to immobilize Ifrit, but with great difficulty, due to the attacks being thrown at him.
"Great, now I have to keep the Ifrit immobilized, and dodge these attacks at the same time." Silver complains.
Metal Sonic fires a missile at Silver, who unfortunately, couldn't dodge in time and takes the hit, sends him crashing into a wall, causing the mine to shake.
The Ifrit is now free from Silver's grip, due to Metal Sonic's interference.
"Great, the mine is collapsing. We'll head for Mobius, after we had our fun there, we'll come back here and take over." Eggman Nega said.
"Understood." Metal Sonic, Shadow Android, and Phi say in response to Egman Nega.
"Now do your thing." Eggman Nega ordered.
"Chaos Control!" Metal Sonic said, and the villains disappeared.
"I need to get out of here." Silver said, but as he got up another flash of light appeared, and Shadow came out.
"Looks like you're in need of assistance." Shadow said.
"Yeah, I sure am." Silver replied.
"Chaos Control!" Shadow said, and they both were transported to the backyard.
Flynn-Fletcher house: The backyard
"So what happened?" Isabella asked.
"They're planning on attacking Mobius." Silver replied.
"What!" Sonic Tails, Knuckles and Amy said.
"What's Mobius?" Buford asked.
"That's our planet." Mighty replied.
"Who are these guys?" Silver asked, referring to Mighty and Irving.
"They're Mighty and Irving, Mighty is Knuckles' friend, and Irving is our friend." Ferb explained.
"We better get back home, and save it, or there will be no home for us to go back to." Sonic said.
"I think these fake Emeralds can still take us back to Mobius." Shadow said.
"All right, let's give it a shot." Sonic said.
"Chaos Control!" Sonic and Shadow both shout, and a bright light engulf the heroes, and they disappear.
Mighty and Irving joined the heroes to save their worlds. The villains retreat to Mobius to destroy it. Shadow rescued Silver and now the heroes are headed to Mobius to stop the villains' plans. Can they defeat the villains and save both worlds? To be continued...