There are numerous possible plots for such a fanfic. One could be that an evil force in the MLP world summons Godzilla to cause destruction as part of a grand plan. The main characters of MLP, like Twilight Sparkle and her friends, would then try to find the source of this summoning and reverse it. Another idea could be that Godzilla is a misunderstood creature in this fanfic. It comes to the MLP world seeking help or refuge, and the ponies initially fear it but then learn to accept it and help it. Or perhaps there's a magical anomaly that fuses Godzilla with a pony, creating a strange and powerful hybrid that has to come to terms with its new form while also dealing with the challenges in the MLP world.
If 'the bridge godzilla mlp fanfic' exists, the plot might center around a magical bridge that connects Godzilla's world to the MLP universe. Maybe some ponies accidentally cross this bridge and find themselves in Godzilla's territory. Godzilla then follows them back to Equestria, and the ponies have to use their magic and friendship to deal with this huge, unexpected threat. There could also be sub - plots about the ponies trying to understand Godzilla's nature and if there's a way to communicate with it.
Well, it's possible that such a fanfic exists. However, without actually scouring every single MLP - related fanfic site, it's hard to say for certain. Maybe it was created by a very creative individual who wanted to combine the rather unexpected elements of Godzilla and MLP. But again, I can't confirm its existence without further research.
One possible plot could be that Godzilla somehow arrives in the Pokemon world. The Pokemon trainers initially see Godzilla as a huge threat and try to battle it with their strongest Pokemon. But then they realize that Godzilla is not there to cause chaos but is being chased by some powerful and evil force from its own world. So, the trainers and their Pokemon team up with Godzilla to fight this common enemy. This would involve epic battles between the combined forces of Pokemon and Godzilla against the evil force, with lots of strategy and unique power combinations.
One possible plot could be that Godzilla and the female Muto initially start as enemies due to their natural instincts. But then, they are forced to team up against a common, even more powerful threat, like an alien invasion. As they fight side by side, they begin to understand each other's strengths and develop a grudging respect that could potentially turn into an unlikely friendship.
Perhaps the story in the 'drunk mlp fanfic' is centered around a group of ponies who accidentally consume some enchanted cider that makes them drunk. They then start seeing strange visions and go on a wacky journey to find a cure, all while their normal pony friends are trying to figure out what's wrong with them.
Sorry, I can't recommend any specific ones as this is a very specific and rather strange combination. It's not a common theme that I'm familiar with in existing fanfictions.
Well, it could be about Starlight feeling wronged by the ponies in Ponyville. Maybe she decides to take revenge because she was excluded from some important events. So she starts using her magic to create small troubles for the ponies, like making their crops grow slowly or causing minor chaos during their festivals.
The plot might center around a portal that opens between the two worlds. The Hyrule Warriors characters, such as Link or Zelda, are transported to Equestria. There, they discover that the chaos in their own world is somehow related to a disturbance in the harmony of Equestria. So, they join forces with the ponies, like Twilight Sparkle and her friends. Along the way, they face challenges that require both the brute strength and combat expertise of the Hyrule Warriors and the magical abilities and friendship power of the ponies.
Perhaps in the fanfic, Luna has a nightmare about her past as Nightmare Moon. She wakes up crying because she fears that she could lose control again and turn back into that evil form. This would show her internal struggle with her own identity and the fear of repeating her past mistakes.
One possible plot could be that a pony has a really bad toothache and has to visit the dentist pony in Ponyville. The dentist pony discovers that there's a magical element causing the toothache and has to find a way to fix it without harming the patient. It could involve a journey to find a special herb or spell.
One possible plot could be that the ponies accidentally end up in the Attack on Titan world through some sort of magical portal. They then have to figure out how to survive in this harsh environment. They could use their unique pony abilities, like Fluttershy's connection with animals, to try and understand the Titans better. Maybe they could even find a way to communicate with the Titans and find out if there's a way to stop the attacks without all the bloodshed.