For Doflamingo, you can focus on his flamboyant and unpredictable nature. Show his sadistic side in how he deals with enemies, but also explore his more vulnerable moments, like when his plans are thwarted. For Crocodile, emphasize his cool and calculating demeanor. Let his past failures fuel his actions in the fanfiction, like his determination to regain his lost status. Maybe show how Doflamingo's chaos sometimes clashes with Crocodile's order.
One character that would make for an interesting pairing with Doflamingo in a crossover fanfiction is Zoro. Zoro's strong sense of justice and his skills as a swordsman would clash with Doflamingo's devious ways. They could have epic sword battles, and Zoro might be the one to cut through Doflamingo's strings, both literally and metaphorically. Also, Nami could be paired with Doflamingo. Nami's intelligence and ability to manipulate situations for her own gain, although in a more positive way compared to Doflamingo, could lead to some really interesting interactions. She could try to outwit him in a game of wits.
I really like 'Doflamingo's Unseen Side'. It presents a different perspective on Doflamingo. It has a lot of action scenes and also explores his relationships with other characters in the One Piece universe in a unique way.
Maoni's " Celebrating Years " was a popular historical novel. It was published on Qidian Chinese website and was widely loved by readers. The story described how Fan Xian fell into a huge conspiracy when he transmigrated, and this book described how he cracked the conspiracy along the way. You can read or listen to books on the Qidian Reading App. You can also get an experience member by going to Qidian Reading now! The Qidian Reading App provided authentic books and audio recordings. The male lead, Fan Xian, was a person who valued relationships, was somewhat humorous, and had three correct views. At the same time, he was also a person with high martial arts skills. The female lead, Lin Wan 'er, was an innocent, knowledgeable, and typical lady.
Wang Quan Fu Gui was a character in the national comic " Little Fox Demon Matchmaker " and its derivative works. He was a young genius of the Wang Quan family, a Taoist soldier, the ultimate weapon of the One Qi Dao Alliance. He had killed tens of thousands of people and was known as " Taoist Soldiers Kill Qianmo." In the chapter of the royal power, Wang Quan and Gui Gui died in order to protect Qing Tong, which was specifically in episode 12.
While waiting for the TV series, you can also click on the link below to read the original work of " Little Fox Demon Matchmaker " to understand the plot in advance!
Another plot could revolve around an OC who is a former victim of Doflamingo's cruel rule. This OC could be on a quest for revenge. They might start by gathering allies who were also affected by Doflamingo and then plan a elaborate scheme to take him down. Along the way, they could face many challenges and obstacles set by Doflamingo and his loyal followers.
Yes, there might be such a fanfiction out there. The world of fanfiction is vast and full of creative crossovers. Some writers like to mix different anime universes, so it's possible for someone to write a story where Naruto, from the Naruto universe, is a fan of Doflamingo from One Piece. However, it would be quite an interesting and unique take on both characters.