That was really mixed opinions. Some loved Blueberry's inclusion, while some did not.

Heh heh. Who said that was the only one?

Underswap AU doesn't belong to me, but belongs to underswapped on tumblr.

"Well, we think that he went to go eat somewhere," Papyrus explained. "Somewhere full of grease," he added.

Blueberry and Papyrus' face scrunched up in disgust.

"This is all rather unsettling," Toriel muttered. "Are there any other breaks in that barrier?"

Gaster nodded. "Unfortunately."

Blueberry's eyes shined. "Does this mean that my brother might be here? That would be so cool!"

"It's possible, however I am deeply concerned for my son's safety right now."

"Me too. I'm worried that Sans is in danger," Papyrus exclaimed. "I mean, he disappeared. He left without telling me. He would have been back by now." Papyrus began to rambled.

Gaster nodded. "Yes. And who knows just what universes were opened?"

"Then that settles it," Blueberry stated. He grinned. "We're on a mission to find this universe's me! And the Magnificent Sans NEVER gives up! Mwehehe," he exclaimed.

"This is still so weird," Undyne muttered. She set Blueberry down on the ground. "Come on Blueberry, we're gonna look for Sans."

Blueberry grinned. "Yay! ...Still think it's weird that the roles are switched in this world. So uh... where in the Underground are we?"

"We're actually on the surface Blueberry," Toriel explained.

Blueberry gasped. Stars filled his eyes once again. "Really?! This place is so pretty! No wonder I've never seen anything this spectacular before! I bet Temmie would have loved to see it!"

Undnye groaned. "You have Temmies in your world?"

Blueberry nodded. "Yeah! I met this really nice Temmie too! Does this universe's me have a Temmie friend?"

"We kinda just try to avoid the Temmies," Undyne muttered. "One of them thought that a hard boiled egg was a normal egg..."

Blueberry tilted his head. "That doesn't sound like my Temmie. That sounds like the Floweys."

"Oh," Frisk and Papyrus realized. "Temmies and Flowey's roles are swapped in your universe."

"Oh! So is this universe's Sans' friend a flower?"

Papyrus shook his head. "Not at all."

"Really? Oh right! He would be your friend!" Blueberry grinned.

Asriel and Chara walked down the stairs.

"Good morning," Asriel beamed.

"Good morning," Blueberry shouted back.

Chara's eyes narrowed. "Sans? Why are you wearing that? And... why do you sound so happy?"

"Chara! What if he wants to be happy?" Asriel pouted. "I'm happy to see him like this."

Asgore began to whisper something to the others. "Let us just let them figure it out."

Frisk nodded. "Yeah."

Sans gasped. "It's another human! Man, if Alphys was here, she'd be overjoyed! I'd be in the Royal Guard for sure!"

Chara looked at Sans with a look of shock. "Sans, are you feeling okay?"

"Oh right! I'm not your universe's Sans!" He waved his arms in the air and grinned. "This universe's Undyne has dubbed me,'Blueberry,' so feel free to call me that."

"This is so weird," Chara muttered.

"Well hello Blueberry," Asriel greeted. "Do you know where our Sans is? I don't see him."

Everyone shook their heads.

"No, but I really want to meet this universe's me. I've heard that he's a lot like my Papyrus," Blueberry explained. "I want to see how true that statement is."

"Why bother and look for him? He's gone. Good riddance," Chara stated. She walked over to the couch and plopped down.

"You're not a very nice human, are you," Blueberry asked.

"Nope!" She grabbed the TV remote from the coffee table and turned on the TV. Mettaton EX was featured, but he seemed to be running from something. The camera was shaking as well.

"And now we're here for our new show, 'Trying to Survive as a Crazy Psychopath is Chasing You!'" His voice seemed panicked.

"That looks like my kind of show," Chara noted.

Everyone gathered around the TV. Frisk quickly pulled out her cell phone and called Mettaton.

"It would seem as if we have a caller! Go ahead! You're on the air! Do you have a question about running for your life?"

"What's going on there, Mettaton," Frisk asked.

"Hello Frisk! Well, there's this," Mettaton started. A large blast sounded. The line went silent. "Sorry can't talk now! Blooky drop the camera! We need to run!" The camera was dropped. As soon as the camera hit the ground, the voice cut out.

Gaster looked at the TV with fright and worry. He started out the door. "I need to find my son!"

Toriel and Papyrus followed behind him. Soon, everyone followed Gaster.

They were now standing on an evacuated road, frantically searching for their friend/ loved one.

"Sans," Papyrus called. Blueberry turned towards him he looked back to what he was doing after realizing that he wasn't his Sans.

"Please Sans...," Gaster muttered. He kept creating doors, walking through, then coming back more frazzled. "I can't lose you!"

"Sans please," Toriel muttered. "Where are you?!"

Gaster, after entering and exiting at least fifty doors, fell to his knees in tears. "Sans! I can't lose you again!" His cry echoed through the town. "I just came back! We were all safe! For once in a long while, I was there for you! I was there for you and Papyrus! Please! Please come back Sans!"

Blueberry ran over to the grieving Gaster and wrapped his arms around him. Papyrus did too. They hugged the man.

"Mr. Gaster who's not the boatman, while I am not the Sans you know, I still feel really bad for all of this."

"Dad, we will find our Sans. He will not die. I promise."

Frisk nodded. "Even if I have to go back on my own promise, Sans will not die. I am determined that Sans will stay alive!"

Gaster's sobbing began to slow. "I can't watch him die again," he muttered. "I just can't..."

"And you won't Dad. Not if any of us have anything to say about it," Papyrus assured.

And done! :D

To address a guest, I've never heard of Storyshift. Sorry...

So, I never did say that I'd only include... ONE AU! Okay... I feel like a bad person now.

Oh well! You guys'll have to wait till tomorrow for the next update. That gives me time to type!

So, who do you think it is? Maybe you'll find out next time, or maybe you won't.

Who even knows?

Anyway, hope you liked this chapter! Bye guys!