The Super Mario 64 Halloween Special: Invasion of the Brain Parasites is an episode from the SM64 Bloopers' eight season. It's the 48th episode of the season, and the 338th episode overall. It aired from October 27 to November 2. It's a special, lasting 25 minutes longer than most other episodes.
A race of brain parasites (in fact Munchers, the larves are Nipper Plants) invades the Mushroom Kingdom. Bowser, Bowser Jr., Boom Boom, Pom Pom, the Mini Bowsers and the Koopalings all get infected. Kamek escapes, but realizes that SMG4, Peach, Toad and most other people have already been infected, except for Mario and Luigi...