Alright, tonight is the night of Adult Swim's annual prank for April Fool's Day. Since 2003, Adult Swim has always done a broadcast stunt every year as a prank, some of which have become profound and well-known (most notably the 2009 and 2012 pranks) and now I'm curious as to what the prank is going to be this year. Now, the prank is always done on the night of March 31 and always starts at Midnight (when the clock officially changes over to April 1) and generally lasts the whole night or most of the night. Some years they do a double-prank, either two pranks in one night (like in 2006) or a prank at midnight the first night and a secondary prank the next night aired before midnight (as in 2017 and 2018) Here is a summary of each year's prank.... 2003: The same episode of Harvey Birdman was aired back-to-back in a loop the entire night from Midnight until the end of the block 2004: Mustaches were drawn on random characters at random points throughout the night 2005: An episode of Robot Chicken was replaced with a surprise airing of the Squidbillies pilot, specifically a poorly-animated black-and-white version of it 2006: A double-prank and one of the more memorable ones alongside the 2009 and 2012 pranks. That night, Adult Swim aired a bunch of campy programs from the 1980's, including Chuck Norris: Karate Commandos, reruns of Saved By The Bell and Pee-Wee's Playhouse, an anti-drug/anti-gang PSA program starring Hulk Hogan and Mr. T, and to top it all off, the final hour was reruns of Fullmetal Alchemist and Ghost In The Shell with fart noises added in. Notably, the reruns of Pee-Wee's Playhouse stuck around on the Adult Swim schedule for a few more weeks in the spring of 2006. 2007: The long-awaited Aqua Teen movie was advertised to air on the block, and after the opening credits finished, the movie shrunk down to a small box on the corner of the screen with no audio while normal programming aired. 2008: A bunch of failed pilots aired that night as a marathon 2009: The Room aired that night and it is argued that Adult Swim airing it as a prank helped expose the movie to a larger audience, helping turn an obscure flop into an internet sensation and the biggest cult film since Rocky Horror. 2010: Once again, they aired The Room 2011: The Room aired again, indicating that it was going to be an annual tradition from now on 2012: The Room was about to air, and as soon as the opening credits finished, it cut to a surprise Toonami night. Prior to this, the old Toonami had been dead for years and anime on Adult Swim was seemingly on its last legs and about to be phased out. This prank was so beloved and popular that it convinced Adult Swim to keep anime on the block and revive the Toonami brand in full. It has been theorized that the Toonami prank was intended to be a "last hurrah" and a send-off of anime programming, but was so acclaimed that it had the opposite effect and saved the anime block. 2013: The block aired with cat-themed commercial bumps and random characters having cat pictures pasted over their faces. 2014: The failed one-season show Perfect Hair Forever aired as a surprise marathon 2015: There was a fish-themed prank on the shows and a coin-hunt game on the official Adult Swim website 2016: The week leading up to the night came with promos recapping the previous pranks and a promise that the 2016 prank would be the biggest one yet. When the clock struck midnight, normal programming aired the entire night, with the implication that the prank was that there was no prank. 2017: A double prank. The main night they aired Adult Swim shows with crazy sound effects randomly edited in, such as laugh tracks, chickens clucking, robot voices, and the bass music from Seinfeld, which was considered to be a lame prank but a step up from the previous year. Then the next night in an unexpected twist, a stealth premiere of Rick & Morty Season 3 aired that night until midnight. 2018: That year, Toonami aired with Japanese audio and English subtitles. Even the commercial bumpers and text were in Japanese and there was also a stealth premiere of FLCL: Alternative and the movie Mind Game, the next night they aired a Rick & Morty fan episode from Australia. 2019: Meth is a hell of a drug. Also, something about tennis and Inca ruins.