Well, in many ash and brock fanfictions, the theme of loyalty is prominent. They are loyal to each other through all their adventures. Also, the theme of discovery, both in terms of new Pokémon and new places. Fanfictions might also touch on the theme of facing fears, as they encounter various dangerous situations together and have to rely on each other to overcome them.
Friendship is a very common theme. Brock and Ash have a strong bond in the Pokemon series, and fanfictions often explore and expand on that. Another common theme is growth, both as trainers and as individuals.
Adventure is also quite common. They could go on a journey together that's different from the ones in the original story. Maybe they discover a new region full of unique Pokemon and have to work together to overcome obstacles there. Sometimes, these adventures also involve them helping each other grow as trainers. Another theme is loyalty. Fanfictions might show how Brock is always there for Ash, and vice versa, no matter what difficulties they encounter, like when Ash is in a tough battle and Brock provides crucial support.
Friendship is a common theme. Ash, Brock, and Charizard have a strong bond, and in Kalos, this bond is often tested and strengthened. Another theme could be discovery, as they explore the new Kalos region.
One common theme is redemption. Since Eddie Brock has his own complex past, the OC often plays a role in his journey towards redemption or self - discovery.
One common theme is the idea of the unexpected love. Colby often falls in love with someone he least expects in these fanfictions. For example, in many stories, he might meet a regular person who he then develops deep feelings for.
Power - up and training themes are also common. Sometimes, Brock Lesnar trains with Naruto characters to become stronger in the Naruto - style of combat. Or vice - versa, Naruto characters might learn something from Lesnar's brute force approach. These power - up and training arcs can lead to some exciting battles and character growth within the fanfiction.
One common theme is the struggle between Colby's human side and his vampire nature. He often has to decide whether to embrace his new powers or hold on to his humanity.
One common theme is emotional recovery. Since it's about Colby being hurt, often the stories revolve around how he heals from the pain, whether it's emotional pain like heartbreak or the aftermath of a bad experience.
Typically, these fanfictions often emphasize the friendship among them. They show how they support each other in battles and during their travels in the Kalos region.
Adventure is a common theme. Since they are both from the Pokemon world, they often go on Pokemon -related adventures together in these fanfictions.