In a fanfic, it really depends on how the writer wants to portray it. If the writer wants to emphasize the unique abilities of the Lake Trio and perhaps give them some sort of combined power boost, they could potentially defeat Arceus. However, Arceus has the advantage of being a creator - like figure in the Pokemon world. It has the ability to create and shape the world, which gives it a very high level of power. So, generally speaking, Arceus is more likely to be the victor, but in the world of fanfiction, anything can happen.
The Lake Trio consists of Uxie, Mesprit, and Azelf. Each has its own special abilities related to different aspects of the mind. But Arceus is on a whole different level. It is said to have created the entire Pokemon universe. When comparing their powers directly, Arceus seems to have more raw power. But in a fanfic, the story could be written in a way that the Lake Trio discovers a weakness of Arceus or they team up in a very strategic way. Still, Arceus' status as a supreme being in the Pokemon world makes it a very tough opponent for the Lake Trio.
It's hard to say for sure. Arceus is super powerful as the creator Pokemon. But the Creation Trio also has some really strong abilities. So it could go either way depending on how the fanfic is written.
In fanfics, the battle between the Pokemon Creation Trio (Dialga, Palkia, Giratina) and Arceus can be really intense. Usually, Arceus is seen as the god - like Pokemon, but the Creation Trio also has incredible powers. Dialga controls time, Palkia controls space and Giratina rules over the distortion world. Their clash might be about power struggle or some sort of cosmic balance. It really depends on how the fanfic author wants to portray it.
One possible plotline could be that the Lake Trio discovers a threat to the world that Arceus is either unaware of or is causing (unintentionally perhaps). So they have to battle Arceus to stop this threat. Another could be that a powerful villain manipulates the Lake Trio into believing that Arceus is a danger and they must fight it.
In a fanfic, Ash might have a chance against Arceus. Ash has proven time and again that he can adapt to different situations. He could potentially find a Pokémon's weakness or use some unorthodox strategy. However, Arceus is the creator of the Pokémon world. It has the ability to manipulate reality on a fundamental level. So, on paper, Arceus should win. But fanfics often play with the rules, so Ash could win through some plot - driven miracle.
In a fanfic, Latios could potentially win. Latios is a Psychic and Dragon - type Pokemon. It has high speed and special attack stats. It could use its psychic powers to outmaneuver Metagross. For example, it could use Psychic to immobilize Metagross and then follow up with a powerful Dragon Pulse.
Well, in fanfiction, the outcome between Ash and Harrison can be highly subjective. Ash has Pikachu, his most loyal and powerful partner. Harrison also has some strong Pokemon in his arsenal. If the battle takes place in a terrain that favors Ash's Pokemon, like a forest for his grass - type Pokemon, he might have an edge. But if Harrison's Pokemon are better adapted to a more urban or rocky environment, he could come out on top. It really depends on how the fanfiction author wants to script the battle.
It's really hard to say. Naruto has his powerful ninjutsu skills like Rasengan and Shadow Clone Jutsu. But Godzilla is a huge and extremely powerful monster with atomic breath. In a fanfic, it could go either way depending on how the writer wants to portray the battle. Maybe if Naruto could find a way to quickly get close to Godzilla and attack his weak points, he might have a chance. However, one blast of Godzilla's atomic breath could also cause serious damage to Naruto.
Red is often seen as a more mysterious and less - shown - off kind of trainer compared to Ash. In a fanfic battle, Red's quiet confidence and deep understanding of Pokemon types and moves could give him an upper hand. On the other hand, Ash has a knack for making unexpected moves and getting the best out of his Pokemon even in tough situations. If the fanfic allows for growth during the battle, Ash might be able to quickly adapt to Red's strategies and turn the tables. Also, the power levels of their Pokemon teams would play a huge role. If Red has a fully - evolved team while Ash has a mix of evolving Pokemon, it could be a very different battle.
In a fanfic battle between Dawn and Serena, it's really hard to say who would win. Dawn has her strong Pokémon like Piplup which evolved into Empoleon. Serena has her own powerful Pokémon too. It could depend on the battle situation, like the type advantage. If it's a water - type battle, Dawn might have an edge with her Empoleon. But Serena's Pokémon are no slouches either.
In a Pokemon battle between Ash and Lance, it's really hard to say who would win. Ash has a wide range of Pokemon with unique abilities and strong bonds with them. However, Lance is a very powerful and experienced trainer. His Dragon - type Pokemon are extremely formidable. If Ash uses his Pikachu smartly and combines it with his other Pokemon's strategies, he might have a chance. But Lance's strategic use of his Dragon Pokemon could also give him the upper hand.