Nice! Got a Venkman outfit from the movies, the Ecto-Containment Chamber from The Video Game. Was the Crunch bar a nod to Slimer's extra love for it on The Real Ghostbusters? I remember it appearing a couple times on The Real Ghostbusters, primarily "The Copycat."
More or less, but overall it's a nod to a moment in the movie where Venkman rewards Egon with a CRUNCH! bar after he confirms that they will be able to actually catch ghosts (theoretically). It's a small part in the film, but as any Ghosthead will tell you, it's canon!
"The Box" is from the video game, and it's specially made so that ectoplasmic entities can't pass through its walls... (At least, that's what it seems like. Nothing was really confirmed in the game, that's just an educated guess.)