Definitely include Bill Cipher from Gravity Falls as he is the main villain in Weirdmageddon. Dipper and Mabel Pines are also essential as they are the main protagonists in the Gravity Falls story. If it's a crossover with the Over the Garden Wall universe, Wirt and Greg would be interesting additions. Wirt's cautious and somewhat gloomy nature could contrast with the more adventurous Gravity Falls characters, while Greg's innocence could add a different dynamic.
If you're doing a crossover with the Regular Show, Mordecai and Rigby would be great. Their comical and often irresponsible behavior could lead to some funny situations in the middle of Weirdmageddon. They could learn from the more serious Dipper and Mabel. Also, Benson could be there to try and keep some order among the chaos. Another good character to include could be Eda from The Owl House. Her powerful magic could be a real game - changer in the fight against Bill Cipher.
In a crossover with the Amphibia universe, Anne, Sprig, and Polly would be good choices. Anne's martial arts skills and her growth throughout her own story could be valuable in Weirdmageddon. Sprig's naivete and courage, and Polly's sassiness could add some fun elements. They could all interact with the Gravity Falls characters in unique ways, like Anne teaching Dipper some self - defense moves, and Sprig being amazed by the strange creatures in Gravity Falls.
The best chapter pointer here is Chapter 254, "Madwoman! She is definitely a madwoman!". It opens with Just when everyone thought that Jiang Yan wouldn't last long and would... and closes on A Jiang Li whose head was only filled with books and who never joked or....
The best chapter pointer here is Chapter 213, "Shi Xu, You Must Understand How to Balance Meat and Vegetables". It opens with Jiang Cheng also noticed where Jiang Shixu's attention lay. and closes on As soon as they were seated, Lin Manru picked up the public chopsticks,....
If you want the clearest chapter reference, go to Chapter 211. Early on, Advanced Repair was even more outrageous, costing a whole 30 points.; later, the chapter leans on Not to mention the 50 points for Supreme Repair..
If you want the clearest chapter reference, go to Chapter 212. Early on, Although she appeared outwardly flattered, in fact, her heart was already...; later, the chapter leans on Since Shang Shaojing wanted to use his good score to help her restore the....
If you want the clearest chapter reference, go to Chapter 217. Early on, But Director Sun didn't plan to give her any room to think, he directly...; later, the chapter leans on Deduct them if you must, her total score was already far ahead of everyone....
A practical answer is Chapter 225, because it turns the idea into a concrete scene. The chapter opens with When Zhao Lang's devastatingly handsome face appeared, all six people..., adds pressure through Alright, it's about time, let's officially get started., and ends on Which big shot is.
A practical answer is Chapter 252, because it turns the idea into a concrete scene. The chapter opens with In fact, Jiang Yan's shirtless appearance this time was entirely Jiang..., adds pressure through They are all sitting in front of the screen watching you now." Jiang Li..., and ends on Aren't.
Look to Chapter 260 for the clearest answer. It begins with Yan Dabiao, who deeply felt the sting of deception, flew into a rage and..., keeps building through Damn bitch, go to hell!" Jiang Li, who was dodging the encirclement of the..., and lands on However, if this situation arises again, you.
Chapter 258 is the strongest chapter-level answer because it starts from Just when everyone in the livestream room was immersed in the lively and... and follows through on Is Jiang Li really having an affair with Director Sun?] "[What the hell?.
Chapter 222 is the strongest chapter-level answer because it starts from How come they're even live streaming in a reality show?! and follows through on She was certain and sure that she saw scheming in them..