Well, I think Bumblebee would have a shot at winning in a battle of wits. Bumblebee has been shown to be very adaptable. In a fanfic, he could use his knowledge of Megatron's weaknesses, like his overconfidence. Bumblebee might pretend to be more vulnerable than he really is, luring Megatron into a false sense of security. Then, when Megatron least expects it, Bumblebee could strike with a clever plan. Megatron, on the other hand, is used to being in control and might not expect such a devious tactic from Bumblebee.
A really dramatic plot twist could be if Bumblebee and Megatron had to team up in the fanfic. Maybe there's a greater threat that neither of them can face alone. It would be so unexpected because they're enemies. Bumblebee would have to put aside his hatred for Megatron, and Megatron would have to trust Bumblebee at least a little bit.
Tarantulas is an interesting character to include. He has his own devious plans that often intersect with Megatron's, sometimes as an ally and sometimes as a rival. Tigatron, with his connection to nature and his more spiritual side, can bring a different perspective to the story. And Waspinator, for his comical yet tenacious nature. Despite being often defeated, he always comes back, and his interactions with Megatron can be both humorous and revealing of Megatron's character.
Often, other Decepticons like Starscream might be involved. Starscream, always vying for power, might see Megatron's condition as an opportunity to finally take over. So he could play a major role in the fanfiction, either causing trouble or having a change of heart. And then there could be some human characters who get caught up in the events, perhaps scientists or soldiers who are trying to understand what's going on with Megatron.
" Megatron Mountains and Rivers " was a thrilling time-travel novel with ups and downs. There were two versions of the novel. One was written by Li Zhi, and the other was written by Ye Xiao and Ye Qianxue. Li Zhi's version of the novel was finished. Ye Xiao and Ye Qianxue's version of the novel was about how their sister was bullied by the enemy. When Ye Xiao heard the news, he led millions of Luosha soldiers and went down the mountain to overturn the entire Yunhai City. The plot and writing style of this novel were excellent. It was a very good transmigration novel. If you like this type of novel, I recommend you to read Megatron.
One great Bumblebee and Megatron fanfic could be about their unexpected alliance. Maybe in a universe where they have to team up against a greater threat. They start off distrusting each other but as time goes on, they learn to respect one another's skills.