It involved ruining a great arc that had been going on since ep. 29 by throwing in a time-travel plot that was frankly inappropriate for a show of this kind. I really think Inoue was trying to go in a different direction but someone at Toei wanted to see a Kiva vs. Kiva fight and team-up.
The dog you're going to count as a real character now?
And what the heck did the others do of real significance, Ramon especially? One could even say Tatsulot's nature was one of the things that contributed to the watering down of Kiva's horror motif.
More like "fake drama" that was. What the hell was the point of pretending to kill his mother? Kiva has this Black-esque feud between Wataru and Taiga, and it seemed to be going to a bittersweet finale, but apparently someone at Toei didn't like the idea of Taiga staying a villain. So Inoue instead concocts this farce so that Taiga can suddenly become a good guy, Dark Kiva and Gold Kiva can exist together (and diminish the whole idea of past and present Kivas), and everyone is one big happy family who fights alien vampires from the future.
A year or so ago I was one of the Kiva fans. Now... I still like a lot of the ideas it had, but the actual show is just such a letdown.