The Ark and the Nemesis originally the unnamed ships that brought the Transformers to Earth. Originally they are depicted as flagships downed on Earth.(G1) These vessels are revisited in Beast Wars. Further iterations depict them as normal sized flagships.(comic mediums Ark and Nemesis, Animated and Movie Nemesis) Later Japanese productions and localization took the names and made them planetary sized ships capable of great destruction. In Beast Wars II the Destrons have a world sized Nemesis capable of feeding on planets. In Cybertron the Ark is a planetary sized gunship made by Primus to end the Unicron Singularity. Recently the concept of the Ark and Nemesis are used as forms of previous established characters. Animated Omega Supreme in all but name is the Ark. In Transformers: Exodus Spoiler Trypticon is a Nemesis-class supercruiser boarded by Megatron to go after the Autobot's Ark.