Captain Shark
Member of the Doomcock Army, w/o respect we reject
TV-Nihon's subs said he was. Even then, why did he not take over Earth the first time he came?
Kachidoki Gaim was stronger than a Genesis Driver though. He was same-leveled with Zangetsu Shin (even though Takatora managed to do something against him), but that's only because Takatora was OP as hell. Ryouma wasn't strong at all. He could easily lose against Kachidoki even if he has an upgraded Driver, especially if Kouta would manage to avoid Ryouma's attacks. Remember that Ryouma is not a skillful soldier, so his attacks are pretty generic, even if they are stronger than anyone else's. I doubt Kachidoki could beat an Overlord, though. So Kouta would really need to get Kiwami.
TV-Nihon's subs said he was. Even then, why did he not take over Earth the first time he came?
There's this picture montage showing how even before the Overlord arc, Kaito gets trashed by basically everyobdy, so I can see what you mean. But I think getting another upgrade was pretty appropriate given his need for power, even if that Genesis Driver was just handed to him because Yoko thought it was a good idea instead of something he actually asked for.Well, if you look at the Overlord arc, Baron never had any individual victories outside of the movie tie in episode. I don't think getting stuck with Banana, Mango and Watermelon would have changed things.
Kaito's weakness is what pushes him to becoming an Overlord though. If he had a Kachidoki level upgrade, he wouldn't be in a desperate situation against Ryoma (in fact, thinking about it, they forgot about his Watermelon there).
Ignoring how you just insulted my intelligence with the sentence in bold, that only brings up another question: Why spare Earth? Clearly other dimensions were not able to fend off Helheim either, what makes Earth so different? Hell, why even force evolution on others anyway? There isn't even a "because I can" style statement. This is not even a nitpick, this is basic character motives. This series spends so much time on being "dark" and "the sad" yet when it comes to something that simple it is just "whoops!" *facepalm*Also, it's probably because bringing in the full scale Helheim invasion would've killed off everyone the first time he came. Did you not take basic environmental science in high school? If no organisms have the characteristics to even survive in the first place, then humanity's not going to evolve. Kaito basically only evolved because of his Genesis Driver helping him get used to the Helheim venom. Naked humans with nothing won't be able to fend off something as big as Helheim. This time, humanity has more technology such as Sengoku Drivers and Lock Seeds to fend off for a while and gradually evolve. Even with that, Sagara gave them 10 years to advance even further, more time than they have after the actions of the Overlords.
Ignoring the fact this series broke tradition by getting rid of monsters of the week for no good reason:
Ignoring how you just insulted my intelligence with the sentence in bold, that only brings up another question: Why spare Earth? Clearly other dimensions were not able to fend off Helheim either, what makes Earth so different? Hell, why even force evolution on others anyway? There isn't even a "because I can" style statement. This is not even a nitpick, this is basic character motives. This series spends so much time on being "dark" and "the sad" yet when it comes to something that simple it is just "whoops!" *facepalm*