The Universe is the forth/fifth/sixth stage of the game (depending on which stage you visit first - see Pantheon and Mars). Geniuus is the only zebra to appear on this stage - no Imposters appear. Universe is unlocked when 2 Panks are put together.
Geniuus's level can be increased by combining more Panks, and once it reaches level 3 the player can re-create the universe at any time, resetting zebra progress on Earth, without affecting Mars, the Pantheon or Zebrapedia entries. The player may choose the background colour on recreation, and receives Diamonds and Suns as a reward.