A1 - Pacman & a Ghost
A2 - Darkwing Duck & Launchpad McQuack
A3 - Ren & Stimpy
A4 - Cain & Abel
B1 - Rocky & Bullwinkle
B2 - Beavis & Butthead
B3 - Roadrunner & Wile E. Coyote
B4 - Chip & Dale
C1 - David Hasselhoff & Pamela Anderson
C2 - Homer & Marge
C3 - Charlie Brown & Snoopy
C4 - Tweety & Sylvester
D1 - SpongeBob & Patrick
D2 - Peter Pan & Wendy
D3 - Dilbert & Dogbert
D4 - Yin & Yang
E1 - Squall & Rinoa
E2 - Romeo & Juliet
E3 - Ernie & Bert
E4 - Itchy & Scratchy
F1 - Pinky & Brain
F2 - Bart & Lisa
F3 - Adam & Eve
F4 - Jekyll & Hyde
G1 - Sailor Scout & Samurai Pizza Cat
G2 - Bush & Blair
G3 - Asterix & Obelix
G4 - Kermit & Miss Piggy
H1 - Bonnie & Clyde
H2 - Neo & Agent Smith
H3 - Frodo & Sam
H4 - Barbie & Ken

I didn't know some of them... :sweatdrop