Cure Baro - Dark Pretty Cure, because she shares a seiyuu with ConanEdogawa. Baro is Shinichi/Conan's way of saying bakayarou (idiot).
Cure Bubbles - Cure Marine, to go with the canon Cure Blossom. Now, if there's a third, green Precure...
The third Precure is yellow, but she fits the description of "the toughest fighter", so "Cure Buttercup" is still appropriate. Which probably means Cure Moonlight is Cure Bunny...
Tuxedo Megane/Tuxedo Glasses and Zetsubou Sensei II - The mysterious boy who constantly aids the Cures, that is, before it was revealed that he was actually Coupe taking the form of Tsubomi's grandfather. The former name is given for his role similar to that of Tuxedo Kamen/Mask from "Sailor Moon", and the later for his remarkable resemblence to Zetsubou.
Cure Batman - Alice/Cure Rosetta. Ridiculously rich to the point of absurdity, perfect in nearly everything (while being kind), Crimefighting with Cash (occasionally), coming with her own 'Alice-mobile'... AND having an old butler (Sebastian) for the stand-in of Alfred? Yeah. Strangely, Alice didn't get Batman's emotional trauma, that goes to Makoto/Cure Sword instead.
Her butler Sebastian has created a Transformation Trinket for himself to transform into "Cure Sebastian" who looks pretty much like Batman.
Mana's Harem - The main cast plus Regina, since Mana is shipped with everyone and she has really many Les Yay moments.