Once upon a time, in a strange new world where the boundaries between reality and fantasy were blurred, Godzilla emerged into the Pokemon universe. Pikachu was the first to sense the great beast's arrival. The electric mouse Pokemon was both terrified and curious. Godzilla, on the other hand, was confused by this new land filled with small, strange creatures. As he stomped through the forest, he accidentally knocked down a nest of Pidgey. The Pidgey were angry and began to attack Godzilla, but their small beaks and feathers did little to harm the giant. Meanwhile, trainers from all over the region came to see what was causing the commotion. One brave trainer decided to try and capture Godzilla with a Pokeball, but it was immediately destroyed by Godzilla's atomic breath.
A possible plot could be that Godzilla is accidentally teleported into the Pokemon world. The Pokemon trainers think he is a new, extremely powerful and dangerous 'Pokemon'. So they try to stop him. But as they try to fight Godzilla, they realize that their normal attacks have little to no effect. Then, a group of legendary Pokemon, such as Arceus and Lugia, decide to communicate with Godzilla. They find out that Godzilla is just as confused as they are about this new world. Together, they try to find a way to send Godzilla back to his own world while also dealing with the chaos that his presence has caused in the Pokemon world, like disrupted ecosystems and panicked Pokemon.
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.
The Pokemon characters would likely be in awe or fear of Godzilla at first. Smaller Pokemon might hide behind their trainers or larger Pokemon companions. Trainers, being the more inquisitive ones, would try to assess Godzilla's intentions. Some brave trainers might approach Godzilla with caution, trying to communicate using their Pokemon's abilities like telepathy or by using signs. Godzilla, on the other hand, might not understand the Pokemon world's rules and customs at first and could accidentally cause destruction while just moving around.
One idea could be that Godzilla is drawn to the energy source of one of the Avengers' tech, like Stark's Arc Reactor. This causes chaos as Godzilla approaches the city where the Avengers are based. The Avengers initially see Godzilla as a threat and try to fight it. But then they realize that an even bigger alien force is using Godzilla's presence as a distraction. So, they have to find a way to communicate with Godzilla and work together to defeat the common enemy.
A common theme is the clash of two different power scales. Godzilla is a huge, destructive force, while Pokemon have their own unique powers. So, there's often a theme of how these two types of power interact. Another theme could be the idea of an outsider (Godzilla) in the Pokemon world, and how the Pokemon and trainers react to this strange and powerful being.
One idea could be that Godzilla emerges in the world of Pacific Rim during a Kaiju attack. The Jaegers initially see Godzilla as another threat but then realize he's actually fighting the same enemy. They could team up, with Godzilla's raw power and the Jaegers' advanced technology combining to defeat the Kaiju once and for all.
In a world where Hawkins and the kaiju realm collide, Godzilla emerges in the Upside Down. Eleven senses his presence and is both terrified and intrigued. The Demogorgons try to attack Godzilla, but his atomic breath incinerates them. Meanwhile, the kids of Hawkins are in awe as they watch this giant creature fight their otherworldly enemies. Godzilla becomes an unexpected ally in their fight against the darkness of the Upside Down.
Shinji would probably be terrified at first. He's already hesitant and scared in his normal battles, and Godzilla is much larger and more intimidating than the Angels he usually faces. Asuka would likely be more aggressive, thinking she can take on Godzilla with her Eva. Rei, on the other hand, would be very calm and observant, trying to understand Godzilla's nature. Misato would be in a panic initially, but then quickly start strategizing on how to deal with this new threat. Gendo would see Godzilla as either a new opportunity or a major obstacle depending on his long - term plans.
In an Avengers Godzilla crossover fanfiction, there could be an epic battle. The Avengers might initially be shocked by Godzilla's size and power. Iron Man could try to analyze Godzilla's weaknesses while Thor might see it as a worthy opponent. Hulk could be excited to face such a huge foe. They might have to figure out a way to either stop Godzilla if it's rampaging through a city or team up with it to fight a greater threat.