No. The original Spongebob series is all about fun, friendship and adventures in Bikini Bottom. The 'Spongebob real story' is a completely different and often very dark and inappropriate take that has nothing to do with the original positive nature of the show.
One common theme could be friendship development. Since they are two different characters, exploring how they become friends or allies is a popular choice.
One common theme is the contrast between Master Frown's negative nature and Unikitty's positive one. Writers might explore how they interact in different situations, like Master Frown trying to cause trouble while Unikitty tries to stop him and turn the situation around.
A new character, like a traveling musician fish. Spongebob is always open to new things and experiences, and a music - loving fish could charm him with her melodies. She could perform at the Krusty Krab and Spongebob would be entranced by her talent.
The 'Success Kid' meme originated from a photograph of a baby. The baby's pose and expression were just so perfect for representing success. It's like he's saying 'I've got this' or 'I've achieved something great'. As the internet loves to use images to express emotions and situations, this photo was a natural fit. It can be used when you finally finish a difficult project at work, or when you reach a fitness goal. It has become a popular way to share feelings of accomplishment and pride, and it all started from that one photo of the baby with his fist of sand.
The 'Distracted Boyfriend' meme originated from a stock photo. In the photo, a man is walking with his girlfriend but looking back at another woman. It quickly became a meme because it could be used to represent various situations where someone is distracted or unfaithful in a humorous way, like being distracted from work by something more interesting or being tempted away from one choice by another.