I will tomorrow, I got it just before having to go to work
Peter x9
-GB1, GB2 w Glasses, Courtroom, Slimed, World of the Psychic, GB2, GB2 Khaki, Ready to Believe, Gooey (while Gooey is not actually available, you can turn your 2nd GB1 Peter into this with the new hairpiece)
Ray x8
-GB1, Gooey, GB2, CourtRoom, GB2 w SlimeBlower, Ready to Believe, GB2 w SlimeBlower Khaki
Egon x7
-GB1, LabCoat, GB2, CourtRoom, Gooey, GB2 Khaki, Ready to Believe
Winston x4
-GB1, GB2, Gooey, GB2 w SlimeBlower Khaki
Louis x3
- Vince, GB2, GB2 w Spengler Nametag
Dana x2
- Zuul, Casual
Slimer x5
-Clear, Glow, Normal, Clear with Food, Mischievious
Stay Puft x4
-Happy, Evil, Angry(Glow), Explode
Terror Dog x2
-Normal, Energized
VideoGame Ghosts x4
- Architect, Azetlor, BlackSlimeMonster, Chef
GB1 Ghosts x4
- Gozer, Librarian, Taxi Driver, Subway Ghost
GB2 Ghosts x7
- Vigo, Washington Square, Jogger, Titanic, Tony, Nunzio, Theater Ghost
Misc GB1 x1
- Mayor
Misc GB2 x3
- Janine, Janosz, Liberty
Misc x1
- 25th Anni Blank
By my calculations that makes for 64 different mates