Sonic + Alvin and the Chipmunks: Island Battle

Prologue

A young boy was working on a creation of his: not an instrument of war, but an instrument to end war; the Mega Evolving Titanium Alpha Location and Level Intelligent Xenobot or Metallix. While he was working on his creation, he was listening to The Chipmunks and Chipettes: The Girls of Rock and Roll. His room was in the basement, where he had Sonic the Hedgehog and Alvin and the Chipmunks all over his room. When he was finished, he placed a new chip that would help Metallix run faster.

?: All right that oughta fix the terrorist hacking problem. Initiate Metallix Startup Protocol.

Metallix: Metallix Startup Protocol Initiated. Please say access code.

?: Super Sonic Style.

Metallix: Access Granted. Greetings, Creator. I am glad to be upgraded with the new Central Processor, Graphics Processor and Hologram Processor. I am now willing to create holograms to confuse any enemy which is against all nations. I am programmed to be not an instrument of war, but an instrument to end war.

?: Ugh. If only it were that easy! Many massive terrorist organizations tried to hack into your Artificial Intelligence and I managed to outsmart them, but I've been holding them back to no prevail! I mean I want you to be the perfect instrument to end war, Metallix! Ahem. Now stay still. I will program you with the best anti-malware to prevent the hackers to get into your brain.

As he programmed it he installed it into Metallix's AI. Suddenly, something came up after the download was complete.

?: HUH?! Aw, not again. Sorry, Metallix, we'll come back for the test before the presentation, okay?

Metallix: Yes, creator. Metallix powering down.

Suddenly, after the creator left the room, a black portal came into the room, revealing a dark shadowy figure wearing a mask with one of his eyes showing and a crystal in his chest.

Metallix: Powering up.

?: So many weak enemies. Is there a enemy worthy of a challenge for me.

Metallix: Unidentified lifeform detected as... potential threat. initiating combat mode.

?: And as if to answer, this world sends me... what?! Metal Sonic?! How did you...?

Metallix: Negative. I am Metallix: an instrument to end war, before it begins. Take back the world should the world began.

Infinite: Fine. If you're what you say you are, I will teach you fear... then pain. and then... well, at least the fear and pain will end.

Suddenly, the popular Chipmunks and Chipettes appeared into the room, alerting Metallix of the danger that would come to them should this unknown enemy bring harm to this world.

Metallix: Defending Chipmunks and Chipettes. 

Infinite: I don't think so.

Suddenly a burst of red energy came from the crystal in his chest opening a portal to Sonic's world and begins merging many cities into it.

Metallix: Identify yourself.

Infinite: You may call me Infinite. In the many moments that remain in you. Hehahahah. Hahahahaha! HAAHAHAHAHAHA!!!

Meanwhile in Sonic's world, everything was back to normal. The city was rebuilt, the Zombots were gone, and Sonic was free of the virus. The Resistance celebrated their victory. Suddenly, a mysterious portal appeared in the sky, destroying the city, sucking the residents in, and worst of all, it was happening all over the world. It was Sonic's time again, but when he saw the damage, it may be too big for even the fastest hedgehog in the world.

Meanwhile Metallix was falling from the sky, developing a personality of his own.

Metallix: What is going on?! How is this possible?!

The damage Infinite made seemed super serious as his Phantom Ruby had developed the power to travel to and merge other worlds.

Metallix: I've got to find Infinite. I can't back out on my primary objectives: Serve the United Nations; Fight the Terrorists; End all war!

But the many massive terrorist organizations were in the new merged world too, putting the world in fear. Before he could make a move, an Commercial Flight was about to explode in front of Metallix, but he was saved by a blue blur, thus beginning the adventure of a lifetime.

Sonic + Alvin and the Chipmunks
Island Battle