You see, the previous "All That" block focused on the 90's shows on Nick (one of which was Rocko). Nick decided to focus on late 80's and early 2000's shows, too. The Splat was thus born.
The Splat focuses on the most famous and longest era of Nick: the "splat" era, hence the block's name.
Whoever can edit the main page, update the "Rocko's Modern News" section to say that Rocko airs in reruns on TeenNick's "The Splat" block, not NickToons!