Special Anime
Inugami-san to Nekoyama-san: Nekoyama-san to Onsen Ryokou
Unaired episode bundled with the Blu-ray/DVD Box-Set.
Marumaru sae Ireba Ii. Specials
Original "chibi" styled animations exclusively on volumes of the Imouto sae Ireba Ii. Blu-ray/DVD.
Aa! Megami-sama!: Tatakau Tsubasa
An Angel Eater has been freed in Heaven. Since Goddesses and Angels share body and soul, losing your angel results in going into shock for the Goddess. Lind goes to Earth to protect Belldandy and the others unknowing that it is a trap.
(Source: Anime News Network)
Pocket Monsters Side Story
Episodes of the Pocket Monsters anime which occasionally aired instead of a rerun from the main anime series as part of the Weekly Pokémon Broadcasting Station in Japan. They aired concurrently with Pocket Monsters Advanced from December 3, 2002 to September 28, 2004 in Japan. Outside of Japan, these episodes were only dubbed in the West as part of Pokémon Chronicles.
(Source: Bulbapedia)
Gintama: Shinyaku Benizakura-hen Special
It's the running gag of Ben Johnson episode where animation staff reuse the New Years footage; Yorozuya would sit around the kotatsu eating a bowl of tangerines. They discuss elaborate subjects, Shinpachi complains about reusing animation footage, and then Gin-chan always ending the gag with a pointless announcement.
BanG Dream! Morfonication
A special 2-episode animation featuring Morfonica!
The Morfonica members are excited for the concert-packed summer vacation. Meanwhile, Toko secretly plans what she calls the "Summer Morfonica Plan" with Nanami and Tsukushi.
(Source: YouTube Description)
Yuusha ni Narenakatta Ore wa Shibushibu Shuushoku wo Ketsui Shimashita. Specials
A series of 5 shorts included with the blu-ray release of Yuushibu
Natsume Yuujinchou Shichi Special
Thirteenth episode of Natsume Yuujinchou Shichi released on the 5th Blu-ray volume.
Baka to Test to Shoukanjuu: Matsuri Special
A promotional video that was shown to the public at Comiket 78, and uploaded to YouTube and posted on the official website. It was also included with the first Blu-ray/DVD volume of the Matsuri OVA.
It is done in the style of a visual novel game played on a Nintendo DS screen.
(Source: AniDB)
Gakkou no Kaidan: Kubinashi Rider!! Shi no Noroi
A headless rider terrorizes the town on the anniversary of what was his death, seeking to decapitate people like himself. When the ghost turns his headlights upon Satsuki, the gang needs to find a way to put him to sleep again, and quick!
(Source: Crunchyroll)
So Ra No Wo To Specials
Two extra episodes included in the Blu-ray and DVD volumes 4 and 7 of "Sora no Woto".
The first, episode 7.5, takes place during the series. Felicia proposes a mock battle between the maidens after Kanata sees Rio opening the door to the distillery. If Kanata can win, they'll tell her the truth about the secret room. However, things get out of hand when alcohol gets involved!
The second, episode 13, takes place after the series ends. One of the local children asks Kanata what her dream is. Unable to answer, Kanata talks to the other characters about their dreams and goals.
(Source: MAL)
Senki Zesshou Symphogear G: Senki Zesshou Shinai Symphogear
Shorts released with the Blu-ray and DVD releases of Senki Zesshou Symphogear G.
Suntory Minami Alps no Tennen Mizu
Collaboration commercials with Suntory and Kimi no Na wa..
The "Mitsuha no Omoi" (Mitsuha's Thoughts) commercial shows the character Mitsuha Miyamizu drinking SUNTORY Minami Alps Tennensui Yogurina, which is yogurt-flavored mineral water.
The "Taki no Omoi" (Taki's Thoughts) commercial shows the character Taki Tachibana drinking SUNTORY Minami Alps Ten'nensui, which is mineral water.
The "Kasanaru Omoi" (Overlap Thoughts) commercial shows both Taki and Mitsuha combining their thoughts through mixed dialogue with some alternative footage and a new song.
(Source: Anime News Network)
Toaru Majutsu no Index: Endymion no Kiseki Special
Bonus animation featuring Index-tan included with the BD special edition of the Toaru Majutsu no Index: Endymion no Kiseki movie.