Remember my Info     Photo: Nickelodeon On July 17, 2009, Nickelodeon will celebrate the tenth anniversary of Bikini Bottom's favorite frycook, the one and only, Spongebob Squarepants . In honor of its terrific Porifera , Nickelodeon will broadcast a fifty hour marathon from July 17-19 entitled, “ The Ultimate Spongebob Spongebash Weekend