The interaction between Raphael and Po would be really interesting. Raphael is hot - tempered and Po is kind of clumsy but also very confident. They could start off butting heads but then learn to respect each other's fighting abilities. Also, Donatello and Mr. Ping could be fun. Donatello would be fascinated by Mr. Ping's noodle - making skills and might even try to incorporate some of the techniques into his inventions.
Po and Splinter would have an interesting dynamic. Splinter is a wise and experienced master, and Po would look up to him. Splinter could see the potential in Po and offer him some unique insights based on his ninja training. Also, the interactions between the villains like Shredder and Tai Lung could be intense. They could team up to try and take over both worlds, or they could be at odds with each other as they both try to be the top villain in this new combined universe.
Master Shifu could also be a great crossover character. His wisdom and strict teaching methods could be a valuable addition to the RWBY world. He could perhaps train some of the RWBY characters, helping them to refine their skills in a different way. His small size but great power would be an interesting aspect to explore in the RWBY universe.
Definitely the interactions between the two versions of Leonardo. The 2012 Leo is more light - hearted in some ways compared to the very serious 2003 Leo. They could have some great moments of leadership clashes and then learning from each other. For example, the 2003 Leo could teach the 2012 Leo some of his more stoic leadership techniques.
One possible plot could be that the Turtles end up in the Valley of Peace. They meet Po and his friends. Po is initially shocked by these strange new creatures but quickly realizes they all share a love for kung fu. Together, they have to face a new villain who has the power to disrupt both their worlds. The Turtles' unique fighting styles combined with Po's clumsy yet effective kung fu could make for some great action scenes.
Danny and Leonardo would be really interesting. Leo's leadership skills could clash or complement Danny's more impulsive heroics. Also, Donatello and Danny could have some great exchanges as Donnie is into technology and Danny has his high - tech Fenton gear. They could compare notes on their gadgets.
The Furious Five from Kung Fu Panda and the Konoha 11 from Naruto could have some really cool interactions. The Furious Five's unique Kung Fu styles could be a source of amazement for the Konoha 11. And the Konoha 11's ninja skills, like using jutsus and teamwork, could inspire the Furious Five. For example, Sakura could share her medical ninjutsu knowledge with the Furious Five, and Crane could teach Sasuke some of his swift and precise Kung Fu moves.
One great 'tmnt and kung fu panda fanfiction' is 'The Unlikely Alliance'. It combines the two universes in a really cool way, with the Turtles and Po teaming up to fight a common enemy. Another good one is 'Cross - Dimensional Training' where the characters from both franchises learn from each other's fighting styles.
Po is definitely one of the most interesting characters. His journey of self - discovery and his clumsy yet endearing nature make him stand out.
Raphael could be really interesting. In the 2003 version, he is hot - tempered and tough. In the 2012 version, he also has a strong personality. Seeing how he reacts to his counterpart and how they might either clash or bond could be a great focus. Maybe they have a friendly rivalry as they compare their fighting skills.
Another concept is that the spirit animals in the Kung Fu Panda world are somehow related to the tailed beasts in Naruto. For example, Po discovers that he has a connection to the Nine - Tailed Fox within Naruto. They have to work together to balance the power of these spirits and beasts to prevent chaos in both universes. This could involve a lot of training sequences where they learn from each other's combat styles and philosophies.
Naruto would probably be very excited to meet Po. He would be amazed by Po's size and his unique kung fu style. Po, on the other hand, would be curious about Naruto's ninja abilities. They would likely start by showing off their skills to each other and then quickly become friends.