There might be some fanfics that are relatively well - known within the subset of fans who are interested in this kind of story. However, in the broader scope of all Pokémon fanfics, it's hard to single out one as 'popular'. Fanfic popularity often depends on how well it's promoted within its specific community, the uniqueness of the story, and the writing quality. Since this is a rather specific and niche topic, it may not have a fanfic that has broken out into mainstream popularity among all Pokémon fans.
I'm not aware of any one particular fanfic that is extremely popular in this very specific category. Fanfic popularity can vary a great deal among different groups of readers.
A practical answer is Chapter 127, because it turns the idea into a concrete scene. The chapter opens with Witnessing Jiang Li leave with a bucket, Jiang Yan refused to admit..., adds pressure through [LOL, I'm dying laughing, the Young Master is cursing heaven and earth..., and ends on He Yun.
A practical answer is Chapter 67, because it turns the idea into a concrete scene. The chapter opens with I'm pissed," Jiang Yan cursed again, "These people are too much, aren't..., adds pressure through And it's made by Jiang Li., and ends on Accompanied by the wisps of smoke gradually rising.
The best chapter pointer here is Chapter 105, "He Yun, let me give you a reading". It opens with But this did not elicit any sympathy from the woman on the phone; on the... and closes on However, the next second, things took a turn..
Chapter 85 is the strongest chapter-level answer because it starts from Facing everyone's skepticism and curiosity, Jiang Li explained fluently:... and follows through on This fresh and vibrant flavor blended perfectly..
The best chapter pointer here is Chapter 141, "The Recruitment Contest!". It opens with It had happened in the afternoon when Aunt Ying's son and daughter heard... and closes on Jiang Li couldn't help but laugh and cry..
The best chapter pointer here is Chapter 138, "From now on, let's get to know each other again". It opens with Is there such a good deal? and closes on Could it be that the poison also had a side effect of making a person more....
A practical answer is Chapter 102, because it turns the idea into a concrete scene. The chapter opens with When the camera cut back, the three of them had already returned to the..., adds pressure through Sadly, his forehead was injured, wrapped tightly in bandages, so she..., and ends on The.
The best chapter pointer here is Chapter 87, "Temporary Replacement". It opens with Luckily, at that time, Jiang Li had already taken her pot of stinky... and closes on I'm driven crazy by him every day.] [+1 from above!.
A practical answer is Chapter 89, because it turns the idea into a concrete scene. The chapter opens with Director Sun took a step back, "What's the rush?, adds pressure through The camera isn't on us right now, and Director Sun doesn't know about our..., and ends on If anyone should be mocking.
Chapter 91 is the strongest chapter-level answer because it starts from When Jiang Li saw that he had been assigned a harrow, Qi Tianyu felt his... and follows through on Hahaha, Young Master, what the heck are you thinking about eating!" "I'm....