Through the machinations of Tarantulas, NAVI-ko is "warped" into a body of her own, which transforms into a dolphin. She debuts her new form to the bemused Megatron as she presents him information (secretly provided by Tarantulas) on "Nemesis Prime", an evil clone of their ancestor, Optimus Prime. Megatron wants to add Nemesis Prime to his own forces, so he sends NAVI-ko back in time via a transwarp portal to Doctor Arkeville's Decepticon Base in Yokohama, Japan, in the year 2014 where Nemesis Prime has been detected. 
 
Note: Tie-in manga released online to promote the 2014 Transformers Expo in Yokohama. 
 
(Source: TFwiki)

Fleeing from the war that has raged on the planet Cybertron for millions of years, the heroic Autobots led by Optimus Prime encounter a surprise attack by the evil Decepticons led by Megatron. The ensuing melee aboard the Autobot ship ends when the ship crashes on a volcano. Four million years later, an earthquake reactivates the ship`s computer and resurrects both the Autobots and Decepticons, resuming the great war of the Transformers. 
(Source: AniDB)

Starting off as 4koma and published online to promote the titular Transformers Legends toyline, with special Bonus Edition (出張版 Shutchōban) chapters of the comic packed with the toys themselves, it Initially showcased the misadventures of the Beast Wars cast re-imagined as adult Transformers fans, before eventually taking a more story-driven approach and attempting to connect all the entries of the Japanese Generation 1 anime and manga continuity into one storyline. 

Heavily marketed towards adult collectors and otaku in the face of the brand's dwindling popularity with children after TakaraTomy's largely unsuccessful first attempt in the mid-2000s, it attempted to change the image of the Transformers franchise, with much more "adult", often ecchi-filled humour and numerous references to fan culture.
 
Ulltimately concluded when TakaraTomy began a brand unification with Hasbro starting with Power of the Primes, deciding to mainly sell Hasbro toys as is with minimal changes to packaging. It was eventually succeeded by the more action-oriented Generations Selects Special Comic promoting Hasbro and TakaraTomy's joint Generations Selects imprint. (Source: TFwiki, edited)

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