There were four hippos in the original version of the game: Lizzie Hippo (purple), Henry Hippo (orange), Homer Hippo (green), and Harry Hippo (yellow). A later edition of the game replaces the purple hippo, Lizzie, with a pink one named Happy. Although this passage states there was a purple Hippo named Lizzie, games that are stamped with a 1978 copyright have a Pink Hippo named Happy. In some versions of Hungry Hungry Hippos, Henry is replaced by a blue hippo of the same name. The fall 2009 North American edition of the game has a lighter blue base with pastel colored versions of the Hippos: Sweetie Potamus (blue), Bottomless Potamus (yellow), Veggie Potamus (green), and Picky Potamus (orange).
They really had trouble getting their hippos in a row didn’t they.