Snail

The Snail is hidden in every episode. He is usually seen making cameos by waving at the screen. He can be clearly seen in the episodes Slumber Party Panic, Prisoners of Love, Tree Trunks, The Enchiridion, The Jiggler, Ricardio the Heart Guy, My Two Favorite People, Memories of Boom Boom Mountain, and Evicted. Him making cameos may be a running gag.