Definitely include Whis and Beerus. Whis is a powerful and mysterious character who can train Goku to reach new levels. Beerus, the God of Destruction, can create a high - stakes situation in the fanfic. Also, Future Trunks, with his time - traveling adventures and unique sword - fighting skills, can make the fanfic more exciting.
Vegeta is a great choice. His rivalry with Goku adds a lot of drama and action to a fanfic. Also, Piccolo, as he has a long history with Goku and has been both an enemy and a friend. Another good character could be Gohan, Goku's son, as it can explore their father - son relationship further in the fanfic.
Definitely include Whis. His knowledge and his ability to train Goku can be a great plot point. Beerus, the God of Destruction, can also be included. His temper and his power can create high - stakes situations in the fanfiction. Additionally, Chi - Chi could be added. Her possessive love for Goku can create conflict when it comes to Bulma's friendship with Goku. And Future Trunks is another character that can bring a sense of mystery and urgency to the story with his knowledge of future events.
Obviously, Willy Wonka himself is a must - include. He's the heart and soul of the factory. Charlie Bucket is also great as he represents the pure - hearted visitor. The Oompa - Loompas add a lot of fun and mystery with their strange songs and unique appearance. Veruca Salt can bring in some drama as she was the spoiled brat in the original story.
Optimus Prime is a great choice. His leadership and wisdom can add depth to the story, and his relationship with Bumblebee can be explored further. Also, Sam Witwicky, as he has a strong bond with Bumblebee in the movies. Their friendship can be a central part of the fanfic.
Well, obviously Armikasa themselves are the main focus. But you could also include their friends. For example, their comrades who are with them in training or on missions. These characters can add more depth to the story by providing different perspectives and interactions.
Another good character to include is Lex Luthor. He could be the mastermind behind a plot to drive a wedge between Batman and Wonder Woman. His devious mind and resources would make him a formidable antagonist, and his interactions with the two heroes would add a lot of drama to the story.
Nami would be a great character to include as she has a deep - rooted history with Arlong. Their interactions can add a lot of drama and emotion to the story. Luffy is also a good choice as he is the main protagonist and his values of freedom and justice would contrast sharply with Arlong's tyranny.
Sonic himself is a must - include. His speed and adventurous spirit drive the story forward. Tails is also great as he can provide technical support and is Sonic's loyal friend. And Dr. Eggman, as the main antagonist, always adds conflict and excitement to the story.
Definitely Naruto himself, as he is the main character of the original series. Sasuke is also a great choice as his complex relationship with Naruto can add a lot of drama. Kakashi is another good character to include. His wisdom and unique abilities can be very useful in the story. And Sakura, her growth as a ninja can be explored further in a fanfic.
Definitely Vegeta. His rivalry with Goku and his own Saiyan pride would add an interesting dynamic, especially when Caulifla is involved. He might be initially skeptical of their relationship and could even challenge Caulifla to prove herself worthy of Goku's attention.
Piccolo would also fit well. He has a history of fighting alongside Goku and has a complex relationship with Vegeta. His calm and strategic thinking could add depth to the fanfiction, especially in battles where they need to outwit the opponent.