I was expecting him to be ultron. A mistake made by the Martians experiments along with the full bottles. What's the exact link relationship between the box and him anyway?
Build is a good show, but there are a lot of missed opportunities especially with underdeveloped characters like Sawa and utsumi.
I don't like the body jumping in the last few episodes because it's a bad way to squeeze in more toys especially with repaint Ryuga. I don't think Evolt will use the old forms again. I was expecting more out of shouichi and vernage too after all the build up and mystery teases. Also, it would be a nice plot that Ryuga is entirely a part of evolt instead of him being infected by him before he was born. The whole Ryuga/Evolt thing was kind of forced plot line for Magma, but it was nice except it resolves too quickly. The way Evolt obtain his power and the true purpose of the pandora box including his vague origin was a letdown despite I enjoy the characters and their acting in this show.

We don't know what the link is between Evolto and the box - just that neither were created on Mars. For that matter, we don't know why he has a fondness or the Italian language, either ('Ciao' is an Italian greeting, and 'Evolto' is Italian for Evolution).

Obviously he actually comes from Space Italy.

Now I want to see an episode of the Ninja Turtles where they visit Space Italy. Space Italy a place with aliens, sci-fi, and pizza, the place would basically be Michelangelo's wet dream.