DexBloss

"Don't worry, Dexter. It's gonna be okay. I won't let anything happen to you! I'll always be by your side! I just want you to know that I...I..."

- Blossom confessing her feelings to Dexter in Powerpuff Girls Doujinshi

Blossom X Dexter is the het ship between Blossom and Dexter from the The Powerpuff Girls and Dexter's Laboratory fandoms.

Canon
Blossom and Dexter are protagonists of their respective TV shows, Blossom from The Powerpuff Girls and Dexter from Dexter's Laboratory, as a result, have never met each other. The shows of both are part of Cartoon Network

Both are redheads and fulfill the role of responsible sibling and enjoy studying and learning about science. In the Reboot of Powerpuff Girls, Blossom has a thing for a smart kid who wears glasses just like Dexter, implying that he could be his type, even though he's arrogant.

Fanon
Despite its resemblance, the ship arose due to a manga made by Vinson Ngo called Powerpuff Girls Doujinshi, which resulted in a considerable fan base because during the manga it is shown that they have mutual feelings. In another manga created by the same artist called Grim Tales From Down Below Blossom and Dexter are adults and married.

Powerpuff Girls Doujinshi
This manga Blossom meets Dexter when he moves to Megaville and is transferred to Megaville Elementary. She follows him without him knowing to his lab, where she discovers her sister's android, and Dexter kicks her out. Afterwards, she manages to travel back in time with help to find out about Dexter's past.

When Blossom is kidnapped by Mandark, trapping her in a seal that filled with water so she could drown. After Dexter goes to save her and defeats Mandark, he frees Blossom, but she had already died. At the request of Dexter's deceased sister, Grim lets her live again, and she asks Blossom to take care of Dexter until she returns. When Blossom returns Dexter hugs her.

At school, Blossom attended dance classes and Dexter also came. However, he became depressed after seeing Bubbles dance as he reminded him of Dee Dee. Blossom realizing this suggested that they should leave, which he initially agrees with. Olga, however, sees him when he is about to leave and asked if there was a genius who could fix the stage equipment and Dexter replied that he could do it. After rescanking it, Blossom told Dexter that Olga's real name was Lalavava Astronominov, which shocked Dexter because he discovered that Olga was Mandark's younger sister. After that, he started acting weird with Blossom.

When Blossom is preparing to fire his optical lasers at the central generator where Gir is planting the bomb, Dexter is shown in Blossom's flashback, talking about how emotions can affect the types of outcomes people face. He also told Blossom that controlling one's own emotions can make things more clear, making understanding and decision-making easier and faster.

When Dexter, Blossom, some friends and scientists are having a meeting at Dexter's lab, Blossom later checks to make sure Dexter is okay.

Fandom
FANFICTION

DEVIANTART