Another good pairing could be Jim Halpert and April Ludgate. Jim is known for his dry humor and pranks, and April has her own brand of dark, sarcastic humor. They could team up to play some really elaborate pranks on the other characters from both shows, and their banter would be really entertaining.
Ron Swanson and Jacob Black. Ron is all about his manly ways and love for meat and simplicity. Jacob, as a werewolf, also has a sense of masculinity. They could have a competition over who is more manly. Maybe they start a wood - working project together, but Ron is constantly annoyed by Jacob's werewolf - related absences when the moon is full.
The different work cultures colliding. The laid - back and community - focused environment of Pawnee's parks department in 'Parks and Rec' is so different from the corporate, paper - selling world of Dunder Mifflin in 'The Office'. When the characters from these two worlds meet, there are so many opportunities for humor and drama. For example, when the Pawnee crew tries to understand the strict sales targets at Dunder Mifflin.
A great plot idea would be that a new park is being planned near Scranton, and the employees of Dunder Mifflin get involved. Michael Scott tries to take over the project from Leslie Knope, thinking he can do a better job. Meanwhile, the other characters from both shows interact in hilarious ways, like Andy Bernard trying to serenade Ann Perkins with his acapella group.
Yukari (from Persona 3) and Chie (from Persona 4). Yukari is very outspoken and has a bit of a sarcastic side, while Chie is energetic and a bit of a tomboy. Their different personalities could lead to some really fun and comical interactions, especially when they're facing Shadows together or just hanging out in the school setting.
A cool concept would be if the werewolves from Twilight end up in Pawnee's forests. The Parks and Rec team has to deal with reports of strange wolf - like creatures. Tom Haverford tries to turn this into a business opportunity by creating a 'Werewolf - Watching' tour. April Ludgate, of course, is secretly excited to meet real - life werewolves and tries to befriend them.
Definitely the Flash and Iron Man. Tony Stark's high - tech gadgets and intelligence combined with the Flash's super - speed would make for some really cool scenes. They could work together on building some sort of super - fast vehicle or weapon. Another interesting pairing would be the Flash and Captain America. Steve Rogers' leadership and combat skills along with the Flash's speed could be a great combination for taking on enemies. The Flash could quickly get Steve into strategic positions during battles.
Another great pairing could be Sasuke and Griffith. They both have a certain level of ambition and a thirst for power. They might start off as rivals, constantly trying to one - up each other in terms of strength and influence. But as they face greater threats together, they could learn to respect each other and even form an uneasy alliance. It would be fascinating to see how their different motives play out when they are forced to work together.
I think Spyro and Kakashi would be an interesting pair. Kakashi is a very experienced and intelligent ninja, and Spyro is a powerful dragon with unique abilities. Kakashi could be intrigued by Spyro's magic and his different combat style. And Spyro could be in awe of Kakashi's Sharingan and his vast knowledge of ninjutsu. Also, Spyro and Sakura could be a good pair. Sakura has grown into a strong kunoichi, and Spyro could help her further develop her combat skills, especially in terms of using her strength in more creative ways.
I think Eleven and Bill would make an interesting pairing. Eleven has her telekinetic powers and has faced otherworldly threats in the Upside Down. Bill is the leader of the Losers' Club and is very brave. Together, they could lead their respective groups in a fight against the combined threats of the Demogorgon and Pennywise.