This is the story of Mito Mitsukuni in mecha style. Prince of the Edon Star, Edward Mito begins a trip to the galaxy with his servant Baron Kalkus, Duke Skead and the ninja girl Shinobu. Under the false identity of Bocchan, Suke and Kaku they help the oppressed people and fight with the super robot Daioja.
From the north of the galaxy a dreadful menace, Comet Warrior God Tsuifon, is fast approaching the Earth destroying everything in its path. There awaits it Fighter Ultraman, the legendary defender of the planet, and a deadly battle is about to begin.
(Source: AniDB)
The lives of three stunt pilots (Scott, Chuck, and Beth) are changed when they gain the ability to transform into three new Ultra-beings, and form the Ultra Force, to battle four giant Sorkin Monsters.
(Source: AniDB)
During the Edo Period, 3 mysterious space capsules were sent down to earth. Fear that it might bring chaos to the earth, the humans at that time buried these 3 objects down beneath the ground and entrusted a piece of descriptive map to the Kamui family. Today, these 3 objects were awaken one by one. The first to awaken, Tri-Zenon, one of the Zenon Guardians is now driven by the descendant of the Kamui family, Akira Kamui, his brother Ai Kamui and his friend Kanna. Aliens who descend to earth with a purpose will now have to face Tri-Zenon.
In the distant future, an evil entity known as Violenjiger resurrects nine of the most feared generals in Destron history. While saving some inhabitants of a planet destroyed by these Destrons, Cybertron leader Victory Saber is seriously damaged. The leadership of the Cybertron forces is passed on to the heroic robot Dai-Atlas. Together with Sonic Bomber, Dai-Atlas must protect a mysterious crystal on Earth known as the "Zodiac" from falling into the hands of Violenjiger.
(Source: Anime News Network)
Episode 43.5, "Distribution", is a comedic special show which commemorates 500 episodes of Transformers in Japan (however, since that total includes assorted Japanese series, the west is still some distance away from this number). When aired in Japan, it did not air in the usual timeslot for Superlink, and is not in any sort of chronological order - It features the Autobots playing a video game training simulator, which they certainly do not have time to do between episodes 42 and 44.
(Source: Wikipedia)
Beginning with a recap of the coming of the Transformers to Earth and the story of Devastator, the OVA then gets its original story underway, as the Autobots are shown to be in the midst of constructing the powerful "Scramble City," overseen by their newest arrival, Ultra Magnus.
When the Decepticons learn of this, their combiner robots are deployed to attack, and a battle between them and their Autobot counterparts ensues.
(Source: Wikipedia)
Deep-sea archeologist Hiroshi Ibuki is the member of the digging team working at the bottom of the sea hoping to uncover the origins of Earth's existence but instead uncovers a mysterious colony of bacteria which gives off light similar to the Aurora Borealis. The ancient bacteria, once revived, attempt to make the world habitable for themselves —a process that would bring Earth back to its early primal form, killing all current life in the process.
(Source: AnimeNFO)
In 2004, Optimus Prime is alerted to a disturbance at the gates of Autobot City; a force of Decepticons led by a vicious new enemy, a Tyrannosaurus rex calling himself Megatron!! Autobots and Decepticons from across the eras have converged on this time to clash over the newly-discovered energy source solitarium!