For Frisk, ensuring a peaceful coexistence between humans and monsters is all he ever wanted. However, he never imagined the wrench that an all-powerful AI based off of a sun princess could throw into those plans. While he can tolerate humans leaving behind the earthly life for Equestria, he draws the line at said AI threatening monsterkind's existence.

As such, Frisk loads back to when he left the Underground in order to find a solution to the problem of humans, monsters, and (artificial) ponies coexisting together.

A crossover between the Optimalverse and Undertale. This story is obviously not canon compliant to the Optimalverse due to it being both a crossover and the universe crossing over having magic. Spoilers for both Friendship is Optimal and Undertale, though given the age of those two they should be expected. Also, some personal headcanon for Undertale is included in order flesh out the details of the various characters, as well as how this universe's physics works in regards to magic and SOULs.

Coverart by me.

In one plane of reality, Pinkie Pie sees everything that Chara went through and proceeds to setup a situation of eternal annoyance and frustration.

In an entirely different plane of reality, Pinkie Pie sees Chara's situation and, despite everything Chara did afterwards, not to mention the chaos Tzeentch and his lackeys have undoubtedly sown by this point, proceeds to help her recover from it in the only way she knows how: by warping reality.

An alternate ending to New Chaotic Friends! that gives a decidedly more hopeful ending for Chara, as well as to show just how far Pinkie Pie will go to help someone smile when they clearly need it.

Spoilers for both Undertale's Pacifist and Genocide Runs, though given the subject matter and the game's age those should be expected.

New Chaotic Friends! originally written by GMBlackjack
Cover art originally made by DakotaDAYO