Which series should i watch den o or kiva?

I haven't seen either yet, but most people seem to hate Kiva and love Den-O lol

I like Kiva, but it is more flawed than Den-O. I went Den-O first, because I watched them in chronological order.

Kiva. And if you want you can marathon it through October like I do for thematic reasons (Monster Mash).

I would say den-o just to do.it in chronological order.

Den-O. Only watch Kiva if you legitimately feel like you have to.

Den-O.
Den-O.
Den-O.

...

DEN-O!

Den-O would be the longest time investment of the pair. You're looking at an entire series and atleast seven or eight movies. The story is good, but Momotaros steals the entire show. In a good way. Kiva is something you might enjoy. A series plus like two movies. But the plot has holes, ideas never get flushed out or explained, and not even the lovable characters save it.

But Kiva does have the best designs in all of the franchise.

Eh...I'll give Kiva Ixa and Kiva Emperore and Dark Kiva. The rest...not so much.