Well, with the addition of dragons in the fanfictions, Jon Snow can be seen as more of a magical or otherworldly figure. He starts to incorporate the power of the dragons into his identity. He might become more solitary too, as the power of the dragons sets him apart from others. He has to figure out how to control and use this newfound power, which changes his decision - making process. He may be more willing to make bold moves that he wouldn't have considered before, like flying into enemy territory on the back of a dragon to strike fear into his foes.
In this fanfiction, Jon Snow's character could develop in several ways. Firstly, his relationships with other characters might change. He may form stronger bonds with his fellow soldiers, learning to trust them more. Secondly, his understanding of politics and power could grow. As he is involved in Robb's war, he witnesses the political maneuverings that go on behind the scenes. This could make him more cynical or more determined to fight for justice, depending on how he interprets these events. Moreover, his combat skills are likely to improve, and this newfound strength could give him a different perspective on his own capabilities and his place in the world.
In the Dance of Dragons fanfiction, Jon Snow could be a major force for change. His skills as a warrior and his knowledge of the North might give him an edge. He could be involved in battles, leading the charge against enemies. His relationship with his direwolf, Ghost, might also play a more prominent role. Fanfiction writers might give him new abilities or storylines that deviate from the original books, making his journey in the Dance of Dragons period even more exciting.
His loyalty, which was evident in his relationships in Westeros, would translate to strong bonds with his Pokemon. He would stand by his Pokemon through thick and thin, just like he did with his friends in the North. He might have a small team of Pokemon, but they would be a tightly knit group, relying on each other in battles and in their adventures.
Jon Snow could potentially have allies like the Mormonts. They have always been loyal to the Starks. Maybe even some of the Dornish houses might side with him. They have their own reasons to oppose the current power structure in Westeros. And of course, his friends from the Night's Watch who left with him or believe in his cause could be his allies in this conquest. He might also gain the support of some of the maesters who see the value in his leadership for the future of Westeros.
Daenerys Targaryen could be one to help. Since she has experience with dragons, she could give Jon Snow advice on how to care for the egg and hatch it.
It could be a young and untainted Frey. Maybe a niece or a cousin of the more infamous Freys. One who has not been involved in the past atrocities committed by her family and has a more noble heart.
Daenerys Targaryen is often paired with Jon Snow in such fanfictions. Their combined power and the potential for a different kind of relationship makes it a popular choice among writers. Another character is Arya Stark. Their sibling bond can be explored in new ways when Jon is reincarnated, like Arya helping Jon with her assassin skills in a different plot line.
The North would surely support him. They have always seen him as one of their own and a great leader. Also, the wildlings might back him, considering he has a history of working with them and understanding their plight. Davos Seaworth would most likely be on his side as well, given his loyalty to Jon in the past.