As far as I can remember, there is no such Penny wedgie incident in The Big Bang Theory. The series was filled with different kinds of comical situations. For example, there were Sheldon's idiosyncrasies, Howard's attempts to pick up women, and Raj's selective mutism. But a wedgie incident for Penny just doesn't seem to be part of the storylines.
A lot of fanfiction could explore Penny's emotions during her pregnancy. She might be excited but also a bit scared. In the fanfic, we could see her relying more on Leonard for emotional support. And the gang could throw her a really special baby shower, filled with nerdy and fun elements, like Star Trek - themed baby clothes or a cake shaped like a scientific formula.
The Big Bang Theory didn't focus much on Penny having a weight gain story. Penny was more known for her relationships, her acting career struggles, and her friendship with the guys. There could have been some minor moments where she looked a bit heavier, but these were not really emphasized as a significant part of the plot. Maybe in a couple of scenes, she might have appeared to have gained a few pounds, like when she was in a more relaxed phase of her life, but it was not something that the show delved deeply into. It was more about her character's other aspects like her charm, her attempts to fit in with the nerdy group, and her growth as a person in different areas of her life rather than her weight.
One positive change was her growing acceptance of the guys' geeky interests. She started to enjoy things like comic - con and science - related stuff. Another was her becoming more responsible, like when she got a better job and started to manage her money better.
In The Big Bang Theory, while there were numerous comical situations and interactions, a Penny wedgie story isn't a prominent or often - told aspect. The show was centered around the guys' scientific pursuits, their social awkwardness, and Penny's role in their lives. There were pranks like Sheldon's various attempts to enforce his rules or Leonard's bumbling in his relationship with Penny. However, a wedgie story isn't part of the typical set of comical scenarios that are frequently remembered from the show.
Penny's weight gain could be due to a change in her lifestyle. As she got more into a stable life, she may not have had as much time or motivation to keep up with a strict fitness routine. Also, her job as an actress might not have been as demanding in terms of body image as she advanced in her career. And of course, the social aspect of being around friends who ate a lot of not - so - healthy food could have played a role.
Imagine Penny cosplaying as a sexy character from a fantasy world. She might have chosen a costume inspired by an elven princess but with a more modern and alluring twist. Her long blond hair is styled in loose waves, and she has a tiara on her head. As she walks into Sheldon and Leonard's apartment, they are both in awe. She then starts to act out some of the character's mannerisms, like speaking in an elegant accent and making grand gestures. This not only amuses her friends but also makes her the center of attention at the little gathering they have.
A memorable moment was when they both participated in the scavenger hunt. They showed great teamwork and competitiveness, which was really fun to watch. They were able to use their different skills to try and win the hunt.
Well, Penny's weight gain in The Big Bang Theory wasn't really a major plot point. But we can assume that as she got older and perhaps more settled in her life with Leonard, she might not have been as strict about her figure as she was when she was a struggling actress. There could have been times when she indulged in the guys' junk food, like Sheldon's favorite take - outs. It was more of a subtle thing, and the show mainly used it to show that she was a normal person going through normal life changes.