I'M MAD AT PMD2!!!!!!!!!!! *spoilers*

[jnfs2014]

The main hero and partner can't evolve. :(

[Triforce_Luigi]

What?! I don't have the game yet, but are you completely sure? It might be like in PMD where you have to beat the main game in order to open up a place where you have to take Pokemon to evolve...

[jnfs2014]

OTHER Pokemon can evolve, just not the main 2 due to the main character, when coming from the future in the beginning of the game, made a spacial distortion.

[Gwen Khan]

yes you can read here
http://serebii.net/dungeon2/evolve.shtml