Found

Glitchy: "Halloween! What has happened to you? Why are your eyes red?"

Halloween: "Hahahahahaaaahaa! I- I am going to GET YOOOU!~"

Glitchy: *backs up* "Hallow, please, what is wrong with you? Your scaring me!" *voice trembles*

Halloween: *jolts forward, looming over Glitchy, raising a paw* "You wouldn't understand if I told you, hehaha, you NEVER understand anything you LITTLE IDIOT!" *whacks Glitchy*

Glitchy: *flies several feet away* "Halloween, your being corrupted! Did you dream of the Void?"

Halloween: "Oh, yes, the Void. Dormuan is the one, HE is the creator! HE is our leader! HE is King Dormuan, he owns me now, and has told me to kill you."

Glitchy: "Dormuan is NOT the one Halloween, he has brain-wash-" 

Halloween: *rams into Glitchy* "SHUT UP!"

Glitchy: "Think about Magenta Halloween!"

Halloween: "Dormuan does not believe in romance." *zaps Glitchy with tail*

Glitchy: *is now bleeding light blue blood* "You monster!" *flies away as fast as possible, crying*

Halloween in background: "HAAAAHAHAHAHHAHAHAAHAAAHAAA! COME BAAAACK!~" *fades away into the darkness*



Well now then, we know Glitchy's reaction to Halloween's behavior change.