The villainous Team Rocket members from Pokemon could be fascinating characters in this fanfiction. They could see the chaos of the Call of Duty world as an opportunity to steal powerful Pokemon or sell Pokemon - related technology to the highest bidder. Their devious plans would add an extra layer of intrigue to the story as they try to outwit both the Call of Duty heroes and the Pokemon trainers.
Sgt. Johnson from Call of Duty could be really interesting. Imagine him suddenly facing a Pikachu in the middle of a battle. His tough - guy military attitude would contrast greatly with the cute but powerful Pokemon. He might initially be dismissive but then learn to respect the Pokemon's abilities.
Ash Ketchum would be a great character. He has the experience of handling all kinds of Pokemon. In the world of Call of Duty, he could use his Pokemon knowledge to turn the tide of battles. For example, using Squirtle's water attacks to put out fires caused by explosions or using Bulbasaur's vines to create traps for the enemy soldiers.
Naruto would probably be one of the most powerful. His ability to create countless shadow clones would be really useful against the zombies. He could send clones in all directions to fight the zombies and keep himself safe. Also, his Rasengan could do a lot of damage to large groups of zombies at once.
Perhaps a combination of Soap MacTavish from Call of Duty and Harry Potter himself. Soap is a highly skilled and experienced soldier, able to handle all kinds of combat situations. Harry has his unique magical abilities and his experience in fighting dark forces. Together, they could use their respective skills. Harry could use magic to deal with large groups of zombies at once, while Soap could use his combat skills to take out any remaining threats or handle any non - magical obstacles in their path.
One possible plot could be that Pokemon are used in the battlefields of Call of Duty. For example, trainers send out their Pokemon to scout the area, detect hidden enemies or even engage in combat. Pikachu could use its electric attacks to take out groups of enemy soldiers hiding behind cover, while Charizard could provide air support by breathing fire on enemy positions from above.
It would probably be Harry Potter himself. He has the power of magic, which is extremely versatile. He could use spells like 'Expelliarmus' to disarm enemies or 'Accio' to call weapons to his side from a distance in the midst of a Call of Duty - style battle.
Master Chief from 'Halo' would be an excellent choice. His superhuman abilities and combat experience would add a new dimension to the 'Call of Duty Ghosts' story. He could lead the Ghosts in a crucial battle or teach them some of his unique combat techniques.
Ghost is a very cool character to write about. His mysterious appearance and his combat skills are fascinating. Fanfictions can focus on his past, what made him the way he is. Another character could be Makarov. He's the villain, and writing from his perspective can give a different view of the events in the game.
Issei would be a very interesting character to have a Pokemon. Given his rather impulsive and energetic nature, he could form a great bond with a Fire - type Pokemon like Charmander. He could use the Pokemon's fire attacks in combination with his own Boosted Gear powers in battles against the various foes in the Highschool DxD world. It would also add an extra layer of strategy to his combat style.
Sasuke could be a very interesting character in this crossover. He has his own dark and brooding nature. He might be more interested in the stronger and rarer Pokemon. His sharingan could give him an edge in understanding Pokemon's abilities and behaviors. He could also train Pokemon in a more intense and strict way compared to other trainers.
I think Sonic himself would be the most interesting. He's so different from the Pokemon world. His super speed and his attitude would really stand out. He doesn't have the typical powers of a Pokemon, like shooting fire or electricity. His way of dealing with problems, which is mostly running really fast and spinning into things, would be really unique in the Pokemon world.
Well, the stories that involve the relationships among the members of the Ghost team are also quite interesting. It gives a more human side to the game. Like how they rely on each other and overcome difficulties together, which makes the gameplay more immersive.