Yeah, there was also an episode of the cartoon where a guy gets some magical flute that'll bring about the end of the world, he has a partner that's sort of an Igor/Quasimodo type. That episode with some tweaking would've made a nice sequel. (It ends with the Ghostbusters needing to overload their packs, but before they doo the Igor guy manages to convince the Villian of the Week to undo all of the chaos he's cuased before the Evil Deity of the Week can make his foothold.)
Oh yes, "Ragnarok and Roll." Even though it was a comedy, my favorite episodes tended to be the ones like this that were more dramatic and heartfelt.
Amazing too is that this episode came out in the middle of the second season, when really it had all the elements of a series finale: great animation, a sense of urgency, devastation of the planet, hell on Earth, the race against the clock, nothing going right at all, a suicide run by our heroes, Egon's confession of love, and a rather mature character arc (albeit for a guest character -- the antagonist, no less!), and all in the span of 22 minutes. It's amazing what the cartoon could get away with at times.
Anyway, as for the movie, it's merely OKAY, but fairly mediocre. Even as a child I had watched the original so much that I could spot the similarities in II:
-the first battle
-the montage
-the government stooge hampering our heroes
-the Ghostbusters incapacitated by officials
-the mayor calling our heroes as a last resort
-the main villain being blasted to death
In hindsight, perhaps the last part is the least forgivable. The original had the foreshadowing of crossing the streams and the risk that came with it (and it's now a catchphrase), but the second one didn't... apparently the final solution was to merely blast him. Yes, the crowd's good cheer weakened Vigo, but to me the transition from the crowd to the PEW PEW just didn't feel like it came together. I love me the proton packs as much as the next fanboy (honestly, the proton beam is one of the most beautiful sounds in the universe -- especially TRG Season 2's blast, which came from the films), but I kept thinking, "That's IT?"
Of course, there IS that great line: "Ray, could you move out of the way, we'd like to shoot the monster." How many times have we ever cheered on other movie heroes like Arnold or (hah) Sigourney right before they do the same thing? One of the great strengths of the Ghostbusters was their ability to fight things that before seemed invincible, the stuff of intangible nightmares and unspeakable terrors, when you knew ordinary weapons wouldn't work.