I liked this episode a decent bit. Now, I don't think it is great, because I feel like they missed a very big opportunity with being invisible and pranking people. What we got here, let's be real, wasn't too creative. If they played down the ghost thing, and just did some really cool invisible stuff, that would make it amazing, but what they did here is still fine, I don't hold any grudge. I love Krab's bit, I like how he dresses up in all of this armor just to be terrified off. I also love how the camera shows them straight invisible, I know some people would like an outline or something, but the fact that we are seeing nothing at all, gives the episode a little bit more of an identity to me. We see a lot of people's houses so their is good environment here, and he do get a half-decent gag with each person, again I feel like that is the low point of the episode, considering it could have been so much funnier, but it's OK. There were a few bits I didn't feel too interested in, the "toast" gag was funny, and Krabs trying to escape was fine, just wasn't the funniest, especially considering the season it's in. I loved the reveal though, when they tried to light the dollar on fire, and that's when Krabs used water to reveal them, that's genius. Them getting their proper punishment at the end with everyone they pranked, that's awesome. Also why do they care that it stains clothes? IT'S INVISIBLE SPRAY.
Some low bits, a lot of nice bits, and a solid plot, to me this episode screams GOOD: 7.2/10
Very nice way to end of the Pre-Movie era in my opinion.