Straw Hat Theater is made up of five shorts that aired alongside One Piece episodes 279 through 283 in October 2006. They are based on Oda Eiichiro's side comics that were drawn when he was given three sheets of blank paper by his editor and told to draw anything.
The first short is about Chopper Man infiltrating the lair of the evil Dr. Usodabada. The second short is a news report on what food was like for the Straw Hats before Sanji joined the crew. The third short investigates the hypothetical situation of "if the Straw Hat Pirates were Obahan, who would be the strongest?" The fourth short is about the bosses of the Luffione, Zorocia, and Sanjino families fighting for control. In the fifth short, all of the Straw Hats are carefree monsters.
(Source: AniList.co)
Sleepy Life of SERVAMP
When they are not busy battling supernatural threats, servamps and their Eves enjoy carefree day-to-day affairs and lighthearted quarrels. Naturally, while other servamps and Eves work through their own troubles, Kuro plays video games and dozes off—not much of a change from his usual sleepy self.
Hai ni Mamireta Shoukei: All the world's a stage
During a fight, Hyde recalls the time he used his charm as a hedgehog to trick Licht Jekylland Todoroki—piano prodigy and self-proclaimed angel—into forming a blood bond and becoming his Eve.
(Source: MAL Rewrite)
An Aquamarine gemstone, the Mermaid's Scale, appears in a secret, underground auction. The queen of the underworld (nicknamed the "Bearslayer") coerces the professional jewel-lifter Lupin into stealing the rock for her. Lupin swipes the stone, and quickly discovers not only that it's a forgery, but that the real Mermaid's Scale is part of an unsolved riddle that leads to transcending mortality! Soon, the "Bearslayer" is found murdered in cold blood! Her seemingly immortal young aide, Misa, is kidnapped by the arms dealer Himuro. The race is on for Lupin and his gang to locate the secret to eternal life... before it's used to send the Earth into a state of endless war!
(Source: Discotek Media)
Quiet bookworm of the Sailor Senshi Ami takes pride in her studies, but a rival naming himself "Mercurius" is suddenly outscoring her on the national exams. Combine this with a sudden love letter and a youma feeding on Ami's stress over the whole situation, and Sailor Mercury finds herself in a huge pinch.
(Source: Anime News Network)
Inspector Zenigata is arrested, and the press claims ol' Pops was the true mastermind behind all of professional looter Lupin's heists! It doesn't take long for Lupin's pride to get the better of him, and wealthy magnate Roy Forest manipulates him into accepting a new challenge: stealing the “Time Crystal” within a week. The Time Crystal is a government secret gone public: a super-computer engine that can decrypt secure passwords faster than ever thought possible. But why is Jigen acting so strangely lately? What has become of the young piano prodigy who was recently kidnapped? And most of all, what is the strange connection between them all?
(Source: Discotek Media)
When Fujiko secures a file that documents the location of the fabled Columbus Egg– a mystical relic found by Christopher Columbus which can be harnessed to control the weather– she quickly recruits Lupin and the gang to track down the long-lost treasure. To prevent a sinister villain from finding the Egg, Fujiko memorizes the file and destroys it. Unfortunately, in the process, she contracts amnesia, changing her personality and wiping her memory of Lupin and his friends almost entirely. Can they restore Fujiko back to normal before the Egg falls into the hands of a madman?
(Source: Discotek Media)
Aidou has the idea to hold elections for Moon Dorm's President. The candidates are Kaname and the current president Ichijou. Who will win?
(Source: AniList.co)
Four short spin-off episodes included in DVD/BD volumes.
Episode 1: よろしくツッチー (Yoroshiku Tsucchi) Vol. 2
Episode 2: なかよしツッチー (Nakayoshi Tsucchi) Vol. 3
Episode 3: がんばれツッチー (Gambare Tsucchi) Vol. 4
Episode 4: さよならツッチー (Sayonara Tsucchi) Vol. 5
(Source: AniList.co)
It consists of nothing but Pokémon-speak--similar to the mini-movies that air with each theatrical movie. It's a short special based on life of the Pokémon Slowking. It was never released outside of Japan and Greece, due to it only being a few minutes long. But it was officially dubbed in Russian.
(Source: Bulbapedia and Graffitti studio)