Who Killed Who? (The Grim Adventures of Billy & Mandy)

"Who Killed Who?" is the first half of the twelfth episode in the first season of The Grim Adventures of Billy & Mandy.

Plot
After excluding Mandy from their board game "Who Killed Who?" for being a girl, Billy and Irwin mistakenly throw their dice into the backyard of a haunted house. Grim warns them about the ghost of Mrs Doolin, a lady that lived there. Mandy dares to go inside to retrieve the dice, and she befriends Mrs Doolin, who is alive and well, and who says that all the stories told about her (that anything that went beyond her fence into her garden never came back) are inventions from Grim, whom she beat long time ago at a staring contest.

Why It Rocks

 * 1) The backstory of how Mrs Doolin's house became haunted is pretty interesting, as it has a bunch of kids playing in Endsville back in the good old days, but lose all their balls when throwing them all outside the fence. They send Little Frankie, the Humiskey Kid to retrieve the ball, but he suddenly gets stuck in the corn field and when he sees a shadow of a woman, he drops the ball and never returned since then...
 * 2) Mandy is very relatable and brave here, as she makes an effort to retrieve the ball from Mrs Doolin's yard and not showing any fear of Billy and Irwin saying that she can't play "Who Killed Who?" and is scared just because of her opposite gender. She then explains to Mrs Doolin when meeting her that Billy and Irwin didn't let her join said game just because she's the opposite gender.
 * 3) Some funny moments, such as Mandy and Mrs Doolin saying "fine" and "good" multiple times.
 * 4) Great Plot Twist: It turns out that Mrs Doolin wasn't even evil at all, and is just another nice lady. The part that makes it "evil" is that the games she beat Grim at and he never forgived her and always went back at her with lots of inventions and got beat at a staring contest, and got his dog Lucky by winning it in a poker game, plus still having Billy and Irwin's die.
 * 5) "That stuff makes me crazy, crazy, crazy, craaaaaazy!" - Mrs Doolin summing up Billy & Irwin's characteristics.
 * 6) The way Mrs Doolin and Mandy get back at Billy for his actions is very satisfying and detailed to watch, and it serves as Billy's karma. Plus, Billy apologizes for not letting Mandy join when being scared enough.
 * 7) Decent Ending: When Mandy scared Billy for his actions, he apologizes to Mandy and runs away. Then, Mrs Doolin says in the mirror that Grim has beaten her at everything in ghost form, leading to the conclusion of a sequel episode.

The Only Bad Quality

 * 1) Billy and Irwin were rather unlikable at the start for not letting Mandy join "Who Killed Who?" just because of her gender, which is very sexist. Fortunately, Billy does get his comeuppance as mentioned above.

Reception

 * This episode, along with Tween Wolf, hold a rating of 8.6 out of 100 on IMDB.