One great Fred and George Weasley time travel fanfiction is 'Time - Twisted Twins'. It has an interesting plot where they go back in time to change some small but significant events at Hogwarts. It's really engaging as it shows how their mischievous nature can have different impacts in different time periods.
The 'meeting - their - younger - selves' trope is also quite common. It's interesting to see how the twins interact with their younger versions. They might try to give advice or just have some fun messing with their younger selves. And then there's the 'discovery - of - hidden - secrets' trope. When they travel through time, they might uncover secrets about their family or Hogwarts that were lost in time.
One interesting George Weasley time travel fanfiction could be where he travels back to save Fred. In this story, he might use his knowledge of future events to prevent the tragic incident that took Fred's life. It could show his determination and the strong bond between the twins.
In some fanfictions, George's character might become more serious. For example, if he travels to a time of great danger, he has to take on more responsibilities and lose some of his carefree nature. He may grow from a prank - loving wizard to a more strategic thinker.
Pranks are a very common theme. George is known for his prank - pulling in the original series, so many fanfictions continue this tradition, showing him coming up with new and elaborate pranks.
Another good one is 'My Life with George Weasley'. This fanfiction focuses on the daily life of an OC who becomes friends with George first and then their relationship gradually develops into something more. It shows how they face different challenges together, both in the wizarding world and in their personal relationship.
One great fem Harry and George Weasley fanfiction is 'A Different Sort of Magic'. It explores a world where Harry is a female and her relationship with George unfolds in a really interesting way. The author does a great job of keeping the essence of the original characters while adding a new dynamic.
There is a fanfiction where Ron travels through time to help Harry in a different way. Instead of just being his sidekick in the normal timeline, he uses time travel to change certain events that make Harry's life easier. It's a unique take on the friendship between them and shows Ron in a very proactive role.
There's a fanfic where Ron travels back to his first year at Hogwarts. He uses his knowledge of the future to prevent some of the disasters that happened. It's really interesting as it shows how Ron's actions can change the course of events, and his interactions with his younger self are quite humorous.