The Combo Finder

Click on a grid square to see if the two referenced characters can combine their powers.

Absorbtion

From Mission 9 onwards. Devil Doll gains the ability to temporary clone her teammates' powers. She typically gains a one-shot ability which she has to recharge once used by absorbing off that teammate again. Small orange flames can be seen around her when she is 'holding' an absorbed power.
The absorbed powers are:

King Zero - Ice up an opponent to freeze them, or ice up herself to create ice armour
Adam Zorn - 'Q Beam' energy blast
Anemone - Telepathic scan
The Spider - Shrink
The Fly - Fly's Eye's attack to determine opponents weak points
Chaos - Chlorine; transmute herself into a poisonous gas cloud
Jimmy Jupiter - Atomic Punch

She can absorb powers off other friendly units that appear sometimes, so experiment and see.