Omen had been living in Ponyville for a while, living off of the research grants from a few of the miscellanea that he had brought with him from his own home when he had been suddenly transported. At least until a petition began circulating the top of Canterlot that he was a dangerous madman. Until it gained traction he really didn't mind. He kept to himself, only bothering to descend from his rented room in the castle of friendship to do the weekly tests Twilight asked before returning to his own private reading and experiments.
At least, until it finally reached the courts with enough backing to at least get him evicted. With that going on he could hardly afford to ignore it anymore and donned his best suit. After all, if he wasn't wanted, why bother staying. He just had one little thing to do before he left, one last goodbye before he went to talk to the darlings at the Griffon Empire.