Luna Works At The Oreo Factory

One year after Chapter One, Celestia had forgotten about Luna's slip-up. She had forgotten she was on the moon. Luna was impatient. A cat in a spacesuit with a jetpack came up, suddenly. She noticed Luna and went back down to Equestria, only to bring up duct tape and a LONG ladder. The spacesuit cat taped the ladder to the moon and then secured it down in Equestria. When sh,e was given a thumbs up by the cat, she walked down the slightly steep ladder.

Two minutes later she was zooming to Canterlot with the cat on her back. The cat simply deployed her parachute and let go of Luna before she got out of Ponyville. Luna instantly swiped a bucket of permanent pink dye and teleported it into her sister's room, above her head, and dumped it on her, dying her coat permanent pink.

Luna was grounded.