It was around Christmas in the Gardenview Educational Centre and Museum, and like always, Rudie was going to be cheerful--he always is, he thinks everyday is Christmas. Little did he know, Coal and Pebble were going to give him a not so jolly surprise.

Infamous timeskip

Coal and Pebble were communicating in.. dog language since they're both rock-dogs, planning something. A few minutes later, there was a crackling noise in the lobby, so Rudie and Bobette decided to check it out. Coal and Pebble set the Christmas tree on fire. Rudie looked surprised and/or upset and scared, while Bobette looked disappointed. Disappointed in her pet rock, Coal, to be specific.