Floundering Fathers is the second segment of the thirteenth and final episode of the fourth season of Rocko's Modern Life, as well as the final episode to air.
Rocko, Heffer, and Filburt are about to send the entry form for their float, a hamburger made of hot dogs, to the O-Town Founder's Day Parade. But as they make it to the parade, Ed rejects their float, saying that the parade is not for foreigners. Rocko argues that O-Town was founded by foreigners. But Ed shows Rocko and his friends the O-Town rock, informing that his ancestor John Quincy Bighead purchased the rock and the land for $2.98 and breath mints, thus founding O-Town. Filburt, however, shows a video of turtle eggs being laid underground beneath the rock. The turtles have left and could no longer locate their nest due to poor eyesight, leaving the eggs to hatch on their own, thus validating the fact that Filburt's ancestors technically founded O-Town. Heffer tells how his ancestor Abraham Heffer gave the iceberg address to delineate the sinking of the ship, terminating the war completely. Also, Lewis and Clark were attacked by Redcoats while crossing the underwear, but were saved by an upcoming fruit plane, which they climbed up on. Later, they won the eating contest at the OK Corral in the western town and won the rock in the contest to push it to the exact spot. They then find a knife impaled to the rock and pull it out, thus becoming the founders of O-Town. Soon, Ed, Heffer, and Filburt begin arguing and Heffer attempts to push the rock, with Ed and Filburt trying to hold him back.
The rock tips over, and Rocko reads a sign at the bottom of the rock that says "First Place Eat Out at the OK Corral." This reveals Heffer's story was true. The four also find Filburt's forefathers' nest on the ground, confirming his story too and the nest moves being part of a hat of Rocko's Ancestor who emerges from the hole. Rocko's Ancestor tells Ed, Heffer, and Filburt that he has been down there for two hundred years and reveals they are all wrong, to their shock. He tells them that wallabies were in O-Town before any one of their families until they went to Australia. He also explains that he would have gone too but Heffer's ancestors pushed a rock over his front door, trapping him inside and tells Ed that his ancestor shortened the Native Americans by 29 cents, meaning that Ed owes the Native Americans $37,000 and two tons of breath mints, and he is offered the bill, which he has to pay by thirty days, to his dismay.
In the end, Rocko is the new Grand Marshall of the parade, and it is revealed that Spunky's ancestor has been in O-Town before the wallabies since Rocko's ancestor says that wallabies were only in the city before the steers, turtles, and toads. One of Spunky's ancestors is shown living in the hole under the rock the whole time, and he crawls back inside and closes it with the rock as the show irises out.