Pokémon Masters Animated Trailer

An original special animated trailer made to promote the release of the game Pokémon Masters.(Source: Bulbapedia)
Hakushaku to Yousei Specials

Chibi-Earl and Chibi-Fairy. Every special focuses on another character, who will in their turn recite a poem by Shakespeare, that they feel describes their lives the best.
Arcade Gamer Fubuki: Paradise Beyond the Wall

It’s time for fun at the beach! Check out all the girls from Arcade Gamer Fubuki in their swimsuits.
Owari no Chronicle

April Fools’ Day announcement of a purported anime adaptation of Owari no Chronicle, the prequel light novel series to Kyoukai Senjou no Horizon.
Superflat First Love

6 years after she was swallowed by the Panda Geant, Aya is once again taken into the Multicolor Monogram world and even travels back in time to Paris, 1897 where she meets the young Gaston-Louis Vuitt
Resident Evil 4D Executor

Biohazard 4D Executor was a 20 minute CG movie that people in Japan could (and still can as of this date) see in a special theatre.
Though the CG was primitive, (the rendering and models aren’t
Taiho Shichauzo: Full Throttle Special

Rounding off season 3, Natsumi and Miyuki reminiscince about their lives at Bokuto station while hearing from people they’ve met through work. (This is limited to characters they’ve met in season 3.)
Kyouki Sanmyaku: Naked Peak – Pilot Film

Pilot film for the crowdfunded anime project, based on Kyouki Sanmyaku: Jashin no Sanrei (狂気山脈 ~邪神の山嶺~), a TTRPG scenario that combines the mythos of Cthulhu and mountain climbing.
Yu☆Gi☆Oh! The Dark Side of Dimensions Special: Eien no Rival – Yuugi to Kaiba!

A summary special hosted by Jounouchi and Mokuba discussing the rivalry between Yuugi and Kaiba. They introduce the setting of the series, recap the best quotes from both Yuugi and Kaiba and their ace
Tales of Crestoria: The Wake of Sin

Short animated TV special depicting the prologue of the main story of TALES OF CRESTORIA, showing Kanata and Misella setting off on their journey.