Perhaps the reader is a shapeshifter who can transform into different ice age animals. This ability comes in handy when they need to reach a high place or cross a dangerous area. The group at first is suspicious but then comes to rely on the reader. Another plot could be that the reader has a special connection to the ice, like being able to control it in a small way. They use this power to create shelters or barriers against the harsh weather and predators. Also, the reader could be a storyteller, and their stories not only entertain the group but also give them hope and inspiration during their difficult times.
One idea could be that the reader is a lost traveler who stumbles upon the ice age group. They have unique skills, like being able to predict the weather accurately, which helps the group on their journey. Another could be that the reader is a healer from a far - off land and has to use their special herbal knowledge to cure a sick member of the group. Maybe the reader is an artist and uses their art to communicate with the prehistoric animals in ways the others can't.
One idea could be a story about a human from the Ice Age who discovers a hidden cave filled with ancient markings that lead to a secret power. Another could be a love story between two humans from different tribes during the Ice Age. Or perhaps a story of a human's journey to find a rare herb that can cure a deadly disease spreading in his tribe.
One idea could be a crossover with 'The Lion King'. The Ice Age characters could end up in the Pride Lands. Sid might make friends with Timon and Pumbaa, while Manny and Diego have to deal with the lions. Another could be a crossover with 'Finding Nemo'. The Ice Age gang could somehow find themselves in the ocean, trying to help Marlin find Nemo. It would be a really wacky and fun adventure.
One plot idea could be that the Pokemon have to adapt to the extreme cold of the Ice Age. For example, Pikachu might discover a new electric - based attack that is more effective in cold temperatures. Another idea is that some Ice - type Pokemon become the leaders during this time, guiding other types to find food and shelter. Maybe a group of trainers are also frozen in time and their Pokemon have to figure out how to thaw them out.
Another interesting concept is to have the Ice Age characters compete in a Total Drama - style competition. Sid could be the comical underdog, always trying his best but getting into hilarious mishaps. Diego might use his hunting skills to an advantage in the challenges.
One idea could be to explore the backstory of Scrat and his never - ending quest for the acorn in more detail. Maybe show his early days and how he first discovered the acorn. Another idea is to create a fanfiction where the animals have to deal with a new type of natural disaster in the Ice Age world, something different from what we've seen in the movies. A third idea could be to write about a friendship that develops between two unlikely animals during the Ice Age.
A great plot could be that the wolf OC discovers a hidden valley that is untouched by the ice age's worst effects. However, there is a threat lurking in the valley, like a prehistoric monster. The wolf has to decide whether to keep this discovery a secret to protect its pack or seek help from other animals to defeat the threat.
A plot could involve the reader being a healer of sorts. Flowey, being curious, approaches the reader. As they interact, the reader starts to show Flowey kindness that he's not used to. This kindness begins to thaw his cold, calculating nature. They could then go on adventures together in the Underground, with Flowey slowly becoming more protective of the reader. Also, the reader could introduce Flowey to new concepts like friendship and self - sacrifice, which would be a huge change for him.
One plot idea could be that the reader is a new ninja in the village and Sasuke is assigned to train them. Through the training sessions, they start to understand each other better and develop feelings. Another could be that the reader has a special power that Sasuke needs to help him in his quest for revenge, and as they work together, love blossoms.
One idea could be that the reader is a new resident in the haunted house where Beetlejuice lurks. They accidentally summon him while trying to fix up the old place. Another could be that the reader is a medium who can see Beetlejuice clearly and they form an unlikely friendship. Maybe the reader is a lost soul like Beetlejuice and they find common ground in their otherworldly existence.
One plot idea could be the reader being a new hunter who catches Hisoka's attention during the Hunter Exam. Hisoka decides to 'mentor' the reader in his own twisted way, leading to a series of dangerous and exciting adventures.