Spike, I believe you, this is normal day... In abnormal day, Twilight will be stupid, Sombra will be in love with Rainbow Dash, Discord will be normal (can you be normal in abnormal day...?), Pinkie will be sad, Chrysalis will defeat Nightmare Moon and I will see they all in real!
...Um, only if the costume-to-real spell worked retroactively. And Lyra being geniune does absolutely nothing to stop the aliens from sending a DIFFERENT spy disguised as sompony else in the altered timeline.