Eevee is quite popular too. Since it has so many evolution forms, there are a lot of possibilities for interesting truths and dares. For example, it could be asked to tell the truth about which evolution it secretly wishes it could be. And then there's Bulbasaur. It's an iconic starter Pokemon and can be in some really cute and interesting truth or dare situations, like being dared to use its vines to do something unusual, like writing a message in the dirt.
Pikachu is often very popular. It's so well - known and loved in the Pokemon world that it's a natural choice for these stories. Also, Charizard. Its cool and powerful appearance makes it a favorite for both truth and dare scenarios. It could be dared to do something really challenging like flying through a dangerous storm.
Harry Potter himself is often a popular character in such fanfiction. His adventures and the secrets he could potentially reveal in truth or dare make him interesting. Hermione is also popular as she has a lot of knowledge and secrets. Ron, with his humorous nature, is another common choice.
Daenerys Targaryen is another one. Given her strong will and power, seeing her in a truth or dare situation can be fascinating. She might be asked in truth about her real intentions for the Iron Throne or dared to use her dragons in a risky way.
Uraraka could also be likely to choose truth. She's friendly and open - minded. She might see choosing truth as a way to bond more with her classmates and share some of her dreams or experiences in the hero academy.
A powerful and corrupt Pokemon Gym Leader could be the main antagonist. They might see Gary as a threat to their power and use the truth or dare situation to undermine him. For example, daring him to battle their strongest Pokemon with a huge handicap, or trying to get him to admit something that would damage his reputation among other trainers.
Obviously, Harry, Hermione and Ron are the most likely. They are the main characters and are always together, so it's natural for them to be playing truth or dare. Neville could also be involved as he's their friend. And Ginny might join in too, especially as she gets older and becomes closer to the group.
Percy Jackson himself is often involved. His adventurous spirit makes for great truth or dare situations. Annabeth Chase is also a popular character in these fanfictions. Her intelligence can lead to some really interesting truth revelations or daring dares. Another one is Grover, who with his unique abilities and personality, can bring a lot of humor to the truth or dare scenarios.
I think Skye would also be a likely candidate to choose truth. She's a bit more cautious and ladylike. She might not want to get into a dare that could make her look silly or get her into too much trouble. So, when given the option, she'd probably go for truth and share some interesting stories about her flights or rescues.
One interesting plot could be where the Pokemon are made to tell the truth about their secret training techniques. For example, Pikachu might reveal that it practices extra hard in a certain area of the forest. Another could be a dare where a Pokemon has to swap its usual moveset for a day, like Charmander having to use Water Gun instead of Flamethrower, which would lead to some really comical and challenging situations in battles or daily interactions.
Gary is another character that stands out. He might be the rival who is always one step behind Ash in terms of popularity but is constantly trying to up his game. He could be part of the advanced Pokemon training class and is known for his vast knowledge of different Pokemon species.
Squirtle is very popular. Since it has water - based abilities, it can easily be related to the ink - based battles in Splatoon. It could be a key character in a story where Pokemon and Splatoon characters team up for a water - ink related mission. Also, the main Inkling characters from Splatoon, like Agent 3 or Agent 4, are popular as they are the main representatives of the Splatoon world. They can be shown as having adventures in the Pokemon world, learning about Pokemon training and sharing their ink - fighting techniques with the trainers there.