NintenSCP

Item Description: A copy of the game Super Mario Odyssey for the Nintendo Switch. Selecting the Wario Cap and Wario Suit as Mario’s outfit in-game will invariably cause the player to experience excessive gas and flatulence for 2 days following.
Date of Recovery: 2/9/2019
Location of Recovery: █████████, United States of America
Current Status: In storage.

Item Description: A copy of the video game Super Smash Brothers: Ultimate for the Nintendo Switch in which the playable character Ness (from the Mother series of video games) has been entirely replaced by Sans, a character from the video game Undertale, who has an entirely separate set of moves and abilities. Additionally, should the copy be inserted into a Nintendo Switch console also with Undertale installed and Undertale be launched, the reverse will have occurred, with Sans being replaced by Ness in every sense, including entirely new dialogue and story events to account for Ness' presence rather than Sans', as well as an entirely new boss fight.
Date of Recovery: 26/12/2018
Location of Recovery: A GameStop store in Atlanta, Georgia.
Current Status: In the Site-77 break room for recreational use.
Note: You would not believe how many subreddits I could throw into chaos with this thing. -Jr. Researcher Jacob Hernandez

Item Description: A blank Gameboy Advance cartridge that assimilates the user inside the device it was loaded in regardless of the fact if the device in question was anomalous or not.
Date of Recovery: 03/12/2018
Location of Recovery: A Prometheus Lab Facility located in Iceland.
Current Status: In storage at Site-17 Anomalous Objects locker.
NOTE: Retrieved by Mobile Task Force Omega-20 ("Thought Police") as part of Operation Red Thunder.