Lake Guardians and Dawn, yes, for that exact reason, they're all hanging around in the lake so she saw them and wants you to bring them to her.
Palkia and Dialga to Mars and Jupiter, yes, but I forgot which way round I put them...
You had Giritina right the first time, she's going to Fantina
Heatran and Bertha, yep
Manaphy is going to Maylene, neither of them had a good match but I've got about half of an idea ready to put them together
Arceus and Cynthia, YES!