Rick had to leave his universe and everything behind, including Mortys, and even though it hurt, he had to do it because Rick Prime had found him and he wasn't ready for that yet So he did the smartest and most mature thing possible: He went into hiding in a universe, killed that universe's Rick, and hid without telling anyone there

And then there was you, not knowing that your grandfather wasn't really your grandfather. And due to Rick's carelessness, he had left the garage door ajar, and you stopped to see how much your grandfather was hiding, having not come out for days

You saw him working on one of his inventions. He didn't flinch when he heard the door

"What do you want, Morty?"

He said in a brusque tone out of habit but froze when he realized