The Great Fish Fiasco is the 3rd episode in Koopa Kingdom(Invasion 2).
This episode was insanely hard that no-one can beat it, one user lost all 22 of his lives, another sued Redigit, and another Removed every single Cheep Cheep from the level and Threatened to Kill Redigit if he sees another insanely hard level.
This has got to be the Most Hated and Most Hardest Level Ever.
It also Has Enemy Spam in it so Redigit isn't a good level designer after all.