A plot could revolve around an OC who has a magical musical instrument. The Chipmunks are intrigued by it and together they figure out how to use it to create the most amazing music ever. Along the way, they might face a villain who wants to steal the instrument for their own evil musical plans.
One idea could be an OC who is a talented musician but is shy. The Chipmunks discover this OC and help bring out their confidence on stage. For example, they could encourage the OC to perform at a local talent show.
One plot idea could be that the sister chipmunk joins the boys on a musical tour and has to overcome stage fright. Another could be a story where she discovers a hidden talent for songwriting that helps the group create a new hit album. Maybe she gets lost in a big city during a promotional event and has an adventure while the boys are searching for her.
One idea could be to write a fanfic where the chipmunks go on a magical adventure in a new, enchanted forest. They could discover new friends and face challenges together.
Maybe there's a competition in their town, like a battle of the bands. The Chipmunks and Chipettes have to work together to create a unique performance that showcases their individual talents as well as their ability to collaborate. They face challenges along the way, like a broken instrument or a member getting sick, but they overcome them with their friendship and determination.
One idea could be a crossover with the Smurfs. Alvin and the Chipmunks could accidentally wander into the Smurf village while on an adventure in the forest. They might initially be seen as strange little creatures by the Smurfs, but then they team up to save the village from Gargamel who has a new plan that involves using the Chipmunks' musical talents to lure the Smurfs.
One idea could be a story where the Chipmunks become human for a day and experience high school. They could struggle with typical teenage problems like fitting in and dealing with bullies.
Well, a possible plot could be that the OC (original character) is a new neighbor to the Chipmunks. The OC is a talented musician but is very shy. Alvin and his brothers discover the OC's talent during a neighborhood talent show rehearsal. They encourage the OC to overcome shyness and perform with them in the actual show, leading to a great friendship.
A great Alvin smart fanfic might be where Alvin figures out a way to save the Chipmunks' tree house from being demolished. He uses his intelligence to find a legal loophole or comes up with a brilliant plan to raise enough money to buy the land it's on. For example, he might organize a huge concert with the Chipmunks and use the proceeds for this purpose.
They could compete in a school - like setting. Imagine they are in a chipmunk academy and there's a big academic competition. Alvin is more street - smart and Simon is book - smart. They initially see each other as rivals in this competition. But as the story progresses, they realize that by combining their different types of intelligence, they can outperform all the other chipmunks.
Rather than delving into adult fanfiction which goes against the family - friendly nature of Alvin and the Chipmunks, we can think about the lessons that can be learned from the normal stories. For example, their friendship and how they support each other through various challenges can be an inspiration for kids and also make for great non - adult fanfiction themes.
One interesting story could be about the baby chipmunks' first adventure in the big city. They might get lost but then use their unique musical talents to find their way back home.