The episode starts with Gumball and Darwin reading Anais' diary in their room. The diary explains how Anais made a new friend named Jodie, beginning when Anais gave her a pen. With Gumball imitating Anais' voice, Darwin interrupts him by giving him a warning about reading Anais' diary. However, Gumball ignores him, saying that they did the "pros and cons," which is then shown to be an extensive list, largely of cons, going through much of Elmore. As they read more of Anais' diary, the boys suspect that Jodie is being abusive towards his sister, stealing her lunch, trading science projects so she could get a better grade, and forcing Anais to hold her heavy backpack. Darwin then mentions that Gumball is being overprotective like his mom, but Gumball believes Jodie is a parasite.
In school, Gumball and Darwin try to spy on Jodie. They find a girl that looks exactly like they imagined. Gumball throws Darwin's shoe and knocks her unconscious, but they realize that the duck-girl walking with Anais around the corner was the real Jodie. As Darwin checks to see if the Sparkle Girl was ok, Gumball plans to knock out the real Jodie instead, but Darwin interrupts, saying they should check if Jodie is actually being abusive towards her.
They watch as Anais, supposedly urged by Jodie, puts all of her money in the school vending machine in an attempt to appease her friend, who acts with indfiference. Gumball and Darwin react by showing both sadness and anger towards seeing their sister in doing so.
In the next scene in gym, Gumball attempts to throw a a ball to hit Jodie. However, Anais protects Jodie, causing her to get injured. Darwin tries to stop him, but he throws another one at Jodie. Gumball explains he's trying to prove that Jodie is "brainwashing" her. Darwin tells him to talk to Anais when she's alone. Gumball agrees but throws another one hastily before leaving, which Anais deflects again.
In the halls, the three siblings have a conversation about Jodie. Anais gets mad about Gumball reading her diary, using her voice without permission, and trying to hurt Jodie, but is touched that they cared that much about her. Gumball tries to tell her that she's a parasite, but Anais ignores him and insists that Gumball leaves her alone and not ruin her friendship.
At lunch, right as Anais chimes in to pay for Jodie's lunch, Gumball jumps in, offering them a bagged lunch prepared by Richard instead. Anais, suspicious about the one that he gave Jodie, asks Gumball if they're all the same, which Gumball affirms. Still doubtful, Anais gives the one he gave Jodie to Gumball instead. The two end up shuffling the bags around for a while before Rocky jumps in and rapidly shuffles them up, trying to make it fair for everyone. They all proceed to nervously take a bite of their sandwiches, though all of them end up unharmed. The scene then cuts to Richard, who ended up getting the poisoned lunch, suffocating while trying to call the hospital.
Gumball and Darwin ultimately decide to call Jodie. Using Anais' voice, Gumball tells Jodie that they should stop hanging out, causing Jodie to cry. The two immediately feel bad for their actions and try to approach Jodie to apologize. When they get closer, however, they find Anais and Jodie fused together. Gumball reacts in shock, telling Jodie to leave his sister be, but the creature runs off, trying to escape. Eventually, Gumball and Darwin manage to trap Anais and Jodie in a box that, per accident, is sent flying into the infirmary.
In the infirmary, it is revealed that Anais is the parasite. In the end, Anais unlatches Jodie and has remorse on how she acted towards her, asking Jodie gives her a second chance. By that point, however, Jodie had fled the room, causing Anais to chase after her, ending the episode.
"Obviously something is missing, you notice it too?" This article is a stub. Please help the Gumball Wiki by expanding it. Thank you!
Gumball: [Anais' voice] Dear diary, today it happened, the thing I wanted most, I made a friend. Her name is Jodie. She needed a pen, so I lent her mine. Which is why I wrote this entry with a paintbrush dipped in yogurt. But she smiled at me! From this moment on, I knew we were going to be best friends.
Darwin: Dude, that's a really good impression.
Gumball: [Anais' voice] Thank you.
Darwin: But I'm still not convinced we should be reading this.
Gumball: Ah, come on, we did the pros and cons. [A long list of cons leading to the Crocodile Woman] Okay, quite a few cons. But on the pro's side... [Anais' voice] I hope I get my growth sprout soon, I'm tired of using the cat door at Granny Jojo's house because I can't reach her doorknob.
Darwin: [Chuckles] Okay, let's just read a little more.
Gumball: [Anais' voice] Today, I got to sit with Jodie in the cafeteria. She still looked hungry after finishing her lunch, so I gave her mine. Jodie was scared she'd get a bad grade on her science project, so I gave her that too. [Chuckles] She was right, science is not her strength. But I was happy to help my friend. Later on, we walked back home together, she was tired, so I carried her bag. [Normal voice] Wait a minute, this Jodie is taking credit for Anais' work, getting her to carry her stuff, and her lunch! Do you know what she sounds like?
Gumball: No! I meant [Sighs] You know Anais in spite of being clever and sarcastic, She's also fragile and weird, and she has trouble fitting in, and this person is taking advantage of her weakness! And you know what that's called?
Darwin: A Gumball?
Gumball: Uh, yeah but, I'm the only one who should be allowed to do that, okay?! I don't think Anais should hang around with that kind of person.
Darwin: Now you sound like Ms. Mom.
Gumball: [Nicole's voice] No I don't! [Normal voice] I refuse to let our little sister get tricked by this parasite!
Gumball: Can you see her?
Gumball: Look harder!
Darwin: [Puts a stick in his mouth and makes a face looking harder]
Gumball: No, I meant-[Gasp] There she is!
Darwin: Huh, funny. She looks exactly how I imagined.
Gumball: Darwin, give me your shoe. [Darwin gives his shoe to Gumball] This will teach you for toying with my sister's feelings! [Throws the shoe at the girl, then Anais and Jodie walks by]
Anais: So Jodie, are you hungry? Friend?
[Both Gumball and Darwin gasp]
Gumball: [To Darwin] Do something!
[Darwin runs to the knocked out girl, takes his shoe back, runs back]
Gumball: No! about her!
[Darwin runs back to the girl, holds her hand, then runs back]
Gumball: I got an idea.
Gumball: Give me your shoe.
Darwin: Um, How about we just wait until we see she's just as bad as you think.
Gumball: [Sighs] Alright.
Anais: Jodie, we're friends right?
Anais: Best friends?
Jodie: Well, uh..
Anais: Um, You want some candy? [Puts a few coins in the vending machine]
Jodie: Um, okay.
Anais: Which one do you want? Don't worry. I'll buy one of each. That's what friend's are for. [Puts several coins in the vending machine, then presses the buttons] Yeah, [Chuckles, then all the candy falls out of the vending machine, then Anais takes half of the candy and gives it to Jodie]
Gumball: I don't know what to feel, sadness at our little sister, or angry at that horrible freeloader!
Darwin: How bout both?
[Both Gumball and Darwin makes sad and angry faces at the same time]
[Gumball throws a dodge ball towards Jodie but Anais gets hit for blocking her.]