My Little Pony Friendship Is Magic Season 5 Episode 5 Tanks for the Memories Episode Title:Tanks for the Memories.Episode Description:Rainbow Dash is excited to spend her first winter with her pet tortoise Tank until she learns from Fluttershy that Tank has to hibernate for the winter. Refusing to let Tank hibernate, Rainbow Dash tries to stop winter from coming but cannot hold back the efforts of the hard-working weather ponies. Rainbow Dash then gets an idea to sabotaging the weather factory in Cloudsdale, but inadvertently instead creates a blizzard that speeds up winter. After the rest of her friends arrive at her home to help her cope with saying goodbye to Tank, Rainbow Dash finally agrees to let Tank hibernate.