Penball

Penball is the het ship between Gumball and Penny from The Amazing World of Gumball fandom.

Canon
While it is unclear how long they have known each other for, Gumball and Penny have at the very least known each other since the start of the series. As the series progressed, the two started to get closer and closer until eventually they started dating. The first signs of the relationship developing happened in "The Pressure," where Gumball's crush on Penny becomes apparent and it seems that she reciprocates the feelings. Later in "The Gi", Penny sticks up for Gumball when everyone else starts laughing at him.

The most significant moment in their relationship came in the episode "The Shell." At the start of the episode, Gumball and Penny are performing in a school play when she suddenly ad-libs in a kiss scene between herself and Gumball. Not prepared for it, he accidentally ends up headbutting her and cracking her shell. Later on, Penny visits Gumball in secret and he convinces her to come out of her shell (literally) and be her true self. Upon seeing her true form, Gumball is left speechless by how 'extraordinary' she looks. Unfortunately, Penny misinterprets his silence as looking like a monster, so she ends up running away and into the forest. Gumball chases after her and, upon confronting her, tells Penny how he truly feels about her - and they share their first kiss.

Early on in the series, Gumball's feelings for Penny had a tendency to make him oblivious to the world around him, such as when he agreed to attend her pet spider's funeral thinking it was a date in "The Date". In later seasons, this trait seemed to go away and instead Gumball would act like his normal goofy self around Penny. While most characters would be put off by it, Penny is able to tolerate him and put up with his more unusual moments. She has even shown signs of being on the same level as him.

Gumball has also been shown to become incredibly jealous whenever he feels as though someone is trying to take Penny away from him. For example, in "The Flower", he mistakenly thinks that Penny is dating Leslie - unaware that they are in fact cousins - and allows jealousy to take over him. In "The Dream", he dreamt that Darwin kissed Penny and starts unfairly taking his frustration out on his friend in the real world. Despite these moments, Penny more often than not forgives Gumball for his actions, aware that what happened was not inherently his fault or was an accident.

Gumball at the very least cares about Penny enough to show how much he loves her, even if his measures are a bit extreme - such as proposing despite being 12 years old. If it means going on a date with Penny, he will drop everything just to be with her.

Fanon
This ship is the most popular for both characters.

Fandom
DEVIANTART

FAN FICTION