Knuckles is a red echidna. His origin story has him as the last of his kind on Angel Island. He was tasked with guarding the Master Emerald. He was often tricked by Dr. Eggman into believing Sonic was a threat to the Emerald. He's a strong fighter and his isolation on the island led to his somewhat gullible nature in the face of Eggman's deceptions at first.
Yes, there are some. You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Knuckles the Echidna Naruto' and you might find some interesting crossovers where the writers blend the unique characteristics of Knuckles from Sonic with the Naruto universe in creative ways.
One key element is his heritage as an echidna from a vanished tribe. Another is his solitary existence on Angel Island with the all - important task of protecting the Master Emerald. Also, his initial naivete which led to him being deceived by Eggman, especially when it came to his interactions with Sonic. These are the main aspects of his origin story.
Well, it might be a story where Knuckles' skills as a fighter are put to the test in the Naruto world. He could be mistaken for a strange new ninja at first. Then, he might learn about chakra and try to combine his own natural abilities with chakra - based techniques. For instance, he could use his punching power enhanced by chakra to defeat stronger opponents. Also, there could be a plot where he has to protect the Hidden Leaf Village from a threat that is related to his own world, like an evil Sonic - like character who has also found a way into the Naruto universe.
I'm not sure who the main characters are as I haven't read it. But it could be a brave echidna warrior who leads his troops into battle. Maybe he has some special abilities or a strong sense of honor.
I'm not entirely sure specifically what that particular fanfiction is about as there could be many interpretations. It might be a story that involves characters named Percy and Echidna in some sort of fictional scenario created by a fan. It could potentially be an adventure - based story, or perhaps a story exploring their relationship in a unique way.
One common theme is loyalty. Echidna characters often show great loyalty to their clans or comrades in the fanfictions. For example, they might fight to the death to protect their fellow echidnas.
I don't know the specific story Knuckles tells without more context. It could be an adventure story, a legend from his world, or something personal to him.
Knuckles has a back story filled with duty and deception. He hails from a long line of echidna guardians. His role as the protector of the Master Emerald on Angel Island is central to his story. In the past, he was deceived by Dr. Eggman into believing Sonic was the enemy. This led to many battles and misunderstandings. As he got to know Sonic better, he realized his mistake. His connection to the ancient history of his tribe and the power of the Emerald makes his back story rich and full of depth. He is a character that has grown from being a somewhat naive guardian to a more worldly and wise ally.