Well, some mandrake boys stories could revolve around their discovery of hidden powers. For example, they find out they can communicate with plants and use this ability to save their village from a drought. They learn to work together and understand the importance of nature.
Sure. There's a story where the mandrake boys find a secret garden filled with magical mandrakes. The mandrakes have the power to heal the sick. They have to protect the garden from those who want to use the mandrakes for evil.
Obviously, MK and Mandrake are the main characters. MK is the one who gets kidnapped, so he is likely to be the protagonist in the sense that the story will probably focus on his struggle and how he deals with the situation. Mandrake, on the other hand, is the kidnapper, so he is the antagonist. He is the one creating the conflict in the story.
Well, perhaps Mandrake, being a powerful and somewhat mysterious figure in this fanfiction, has some ulterior motives for kidnapping MK. Maybe it's to gain leverage over a group that MK is associated with. Or it could be a case of mistaken identity, where Mandrake thought MK had something he desperately needed.
The change in its appearance can make it scary. For example, if its usually cute yellow fur turns dark or if its bright red cheeks become a sinister red glow. Also, if it starts to behave in an uncharacteristic way, like making menacing noises instead of its usual cute sounds.
Obviously, the main characters are usually Pikachu. But sometimes, there could be other Pokémon that play important supporting roles. For instance, a Pichu could be a sidekick or a younger Pokémon that the Pikachus are protecting.
One interesting plot could be two Pikachus from different regions meeting and learning about each other's unique electric attacks. For example, one Pikachu might know a special move that the other has never seen before. They could then teach each other and become stronger together.
Naruto would probably be really excited. He'd treat Pikachu like a new friend and teammate. He might try to learn all about Pikachu's powers and how it can help in battles. For example, he'd be eager to see Pikachu use Thunderbolt in a fight against an enemy ninja.
Lucario is also a popular choice to be paired with Pikachu in crossovers. Lucario has its own unique abilities related to sensing and combat. When combined with Pikachu's electric attacks, they can form a formidable team. The contrast between Lucario's more serious and stoic nature and Pikachu's cute and energetic personality also adds depth to the story.