Stay Puft is there for you, yo

Stay puft marshmallow man

After images of him are seen on a billboard and a bag of the marshmallows earlier in the film, he is then seen in the climax of the Ghostbusters movie as one of two physical bodies of Gozer, a god who is defeated when Stay Puft is destroyed. He is then recreated and subsequently captured a number of different times by the Ghostbusters, although mean and destructive at first he later befriends Slimer and the Ghostbusters in the animated series The Real Ghostbusters, and helps them out with various problems.

Yeah, like helping Slimer move into a new apartment, helping Egon out with math, or just going out for drinks with Venkman and helping him get over an ex-girlfriend.