[Sentai]

I have been waiting for this fight. Decade Wins. Let me explain to you why. For every weapon Den-O has Decade has a more powerful answer. Kiva, Kuuga, Ryuki, Kabuto, and even Den-O himself. Den-O is strong. But what is he going to do against Clock-Up, Ultimate Kuuga, Advent Cards, and everything else Decade can pull off? I'm sorry. Den would put up an excellent fight. But Decade wins this.

And the time-travel arguement makes no sense. What stops Decade from becoming Den-O, taking the Liner, and going back to stop Momo from ever meeting Ry? Exactly. Nothing.