Bill sat in his cottage home, now by the beautiful Falls. His thoughts often wandered to the little yellow sponge that showed him so much kindness. Today, there was a knock on his door.

He answered it, and on the other side was another version of himself. Except his colors were inverted, even his eye was a black void with only a tiny slit of white for a pupil.

Inverted Bill Chirped, "Hey there! Name's Rephic! May I come in?"

Bill was suspicious and asked, "What do you want from me?"

Inverted, Bill answered, "I want your power s that we may free Prime from the TheraPrism and take revenge on the Pines family."

Bill said, "Sorry, not interested."

He shut the door quickly, turned away to dust his hands off, and Rephic blasted it down.

Rephic gleefully snarled, "I guess we're doing this the hard way."

Orange flames appeared in Rephic's claws. Bill quickly summoned a fistful of fizzy suds in his own hands.

Bill snapped, "Bring it!"

The two charged at each other.

Meanwhile

SpongeBob, Bubbles, Neptune, and the Axolotl were having an excellent time together enjoying tea out in the vast ocean.

SpongeBob chirped, "I'm honored and humbled you all showed up for this meeting."

The Axolotl gave a slight nod and said, "It is a matter of our friend, Bill Cipher."

Neptune said, "Yes, there's a lot that we want to know."

Bubbles chirped, "And I would never pass up an opportunity to hang out with my little buddy."

SpongeBob then explained as best as he could what happened between himself and Bill. SpongeBob gifted Bill a little flower cloud as a sign of peace. They then spent the day together, just doing things as friends. Then, Bill had killed SpongeBob when the sun was setting. SpongeBob knows now it was for the Void's will. Then he tried to help him break free; then he just left SpongeBob.

SpongeBob then said sadly, "I hope he's okay. That awful Void hurt him so badly, Bill doesn't trust himself anymore."

The Axolotl sighed, "The Void, a hole for light and goodness."

Neptune also noted, "Ah yes, much like Dennis here under the sea."

Bubbles chuckled, "Well until you kicked his butt."

Neptune echoed the laugh and said, "Well, I know a thing or two about killing Titans after my brother freed me from my father's stomach."

The Axolotl then asked, horrified, "Why were you trapped in your father's stomach?"

Neptune scoffed, "He was afraid I might destroy him because of a prophecy his mother gave. It's no big deal."

SpongeBob asked, "Is there anything we can do to help him?"

Before anyone could answer, There was a massive explosion that rocked the party.

The Axolotl felt his anger boil; somehow, he knew someone was here in this timeline that wasn't supposed to.

SpongeBob asked, "What was that?"

Bubbles replied, "Oh, that's just what happens when two Bills clash!"

Then, the horror set in.

Bubbles and Neptune gasped, "Two Bills are clashing!?"

SpongeBob summoned a bubble gun to strap to his back and said, "Let's kick some Geometric butt."

The Axolotl put SpongeBob in a bubble and said, "No, you were told to stay out of Bill's business. Neptune, protect your court. Bubbles, whatever happens, keep your distance. I'll take care of this intrusion."

The two beings flew out of there; SpongeBob dismissed the gun. He sat in the bubble with a sulk. The Axolotl sighed and scooped up SpongeBob to oversee the two different colored Bills clashing. The little cottage was in splinters. The inverted Bill spotted the Axolotl. He shoved Regular Bill down the falls and vanished as the Axolotl charged at him. The Axolotl snarled in frustration, then turned his attention to Bill. He was getting caught up in the water; he had turned into his mermaid form to try to swim against the falls. The Axolotl sighed and closed his eyes. After a minute, he wiggled his gills, and A portal opened beneath Bill.

Bill asked, "What are you doing?"

The Axolotl replied, "I'm sending you to another timeline to get help. Your friendship with Spongebob and Neptune has changed you. Whether or not you know it, that can change the fate of the multiverse. Let go, Bill. Don't fight the flow."

Bill sighed, closed his eyes, and fell into the portal in his mermaid form.