This ending picks up at the part of 'My little Dashy' where the 5 friends and celestia come to take dashy away.
She tells me she doesn't want them to take her, so I tell her to run and I will draw them off. The six who came to fetch dashy get mad and try to kill me, by throwing me out a window. I live, but am injured. The chase follow me into an alley way and I run from them.
We end up in the city streets, but something is wrong, the princess put a curse on our world until she pull dashy back into their plane of existence. Everything is deathly still and very dark; everything is decaying and falling apart, making the city very torn up.
They split up to find me and make me tell them where dashy went. I systematically murder them all and finally face off with the princess, who created all of this as a way to distract me until the sun rose and follow me to where I wanted to meet dashy: none of them really died, but they all saw how brutal I was and they are happy to see me brutalized by the princess.
When they start to take dashy back through the portal to their world, I reach deep down and gather all my strength to save dashy, and kill celestia. Everything is shot back to normal and it was all a hallucination. But in the very end, dashy comes back to me.