What are some interesting ideas for a Lucario and MLP crossover fanfiction?

One idea could be that Thomas the Tank Engine somehow ends up in Equestria. Maybe there's a magical portal that transports him there. He could then interact with the ponies, perhaps helping them with some big construction project like building a new bridge. The contrast between his mechanical world and the magical world of MLP would create a lot of comical and interesting situations.

One idea could be that the ponies from MLP end up in the Underground world of Undertale. Maybe Twilight Sparkle could use her magic to interact with the magical elements in Undertale, like the SOULs. Another idea is to have Sans and Papyrus meet Fluttershy. Papyrus would be all excited to show off his 'coolness' while Fluttershy might be a bit shy at first but then they could become friends over their love for cooking (Papyrus loves making spaghetti).

One idea could be that Godzilla somehow ends up in Equestria. The ponies are initially terrified but then realize Godzilla is more interested in protecting the land from some new dark force that has emerged there. Maybe Godzilla's size and power are a mystery to the ponies at first, and Twilight Sparkle tries to study him to figure out how he got there.

One idea could be that the Pokemon are discovered in the world of MLP. The ponies could be both amazed and a bit scared at first. For example, Pikachu's electric powers might seem like a strange and powerful magic to them. They would have to figure out how to interact with these new creatures.

One idea could be Naruto characters suddenly finding themselves in the colorful world of MLP. For example, Naruto with his determination might inspire the ponies to face challenges bravely. He could teach them about the power of friendship in a different way, like how he values his bonds with Sasuke and Sakura. Another idea is a pony using Naruto - style jutsu. Picture a unicorn pony using chakra to perform a shadow clone jutsu to get more tasks done around Ponyville.

One idea could be that Link, the hero from Legend of Zelda, somehow gets transported to the world of MLP. He might team up with Twilight Sparkle to fight against a common enemy that threatens both their worlds. Maybe Ganon has found a way to corrupt the magic in Equestria, and Link's combat skills along with Twilight's magic knowledge are needed to stop him.

One idea could be that Sora and his friends end up in Equestria. They could team up with the ponies to fight a new threat that is affecting both their worlds. Maybe the Heartless are somehow being drawn to Equestria's magic and they need to find a way to stop it together.

Perhaps there is a portal that connects Cybertron and Equestria. Some ponies accidentally end up on Cybertron and are shocked by the mechanical world. The Transformers have to help them get back home. Meanwhile, some Autobots are curious about the ponies' world and decide to accompany them. This leads to a cultural exchange of sorts between the two groups, with lots of misunderstandings at first but then growing respect and friendship.

One idea could be Discord causing chaos in Equestria that only the Mane 6 can stop with their unique friendship powers. For example, he might mix up the elements of harmony, and the ponies have to go on a quest to put them back in order while dealing with Discord's wacky challenges.

The characters can also develop through shared experiences. For instance, if they go on a quest together, they will face challenges that force them to rely on each other. Ponies might teach Lucario about the joys of celebration and relaxation, while Lucario could teach the ponies how to be more vigilant and face danger bravely. This mutual growth would make for an engaging crossover fanfiction.