The Real Monkey King was a Chinese martial arts novel that told the story of Sun Wukong and the Bull Demon King. The main plot of the story was as follows:
Sun Wukong was the Monkey King of the Flower-Fruit Mountain. He had become a member of the Immortal World because he had eaten the immortal peaches of the Taishang Laojun. Later, he was given the title of "Great Sage Equal to Heaven" by the Jade Emperor and was forced to live under the Five Fingers Mountain for 500 years. During this time, he got to know Princess Iron Fan, Bull Demon King, and others.
Five hundred years later, Sun Wukong was recruited by Tang Sanzang and decided to go to the Western Paradise to obtain Buddhist scriptures. Along the way, he had a series of fights and adventures with Bull Demon King, Princess Iron Fan, and the others. The real Monkey King incident was a conflict between Sun Wukong and Princess Iron Fan.
The fake Sun Wukong was disguised by Zhu Bajie and Sand Monk, the disciples of Tang Sanzang. They wanted to use the conflict between Sun Wukong to stop Sun Wukong from learning the scriptures. However, Sun Wukong had already seen through their plot and decided to fight them. In the battle, Sun Wukong and Princess Iron Fan joined forces to defeat the fake Sun Wukong, but there was a more complicated conspiracy behind the fake Sun Wukong.
In the end, Sun Wukong successfully defeated the conspiracy of Princess Iron Fan, Zhu Bajie and Monk Sand through his wisdom and courage and successfully arrived at the Western Paradise to learn the scriptures. In this process, he gradually understood the true meaning of life and the way of life.
Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.
The 'big monkey little monkey story' could be about a big monkey and a little monkey who are friends. They live in the jungle and go on adventures together, like looking for the tastiest fruits or the safest tree to sleep in.
In general, it's a bit of a toss-up. The strength of Manga Goku and Anime Goku can vary depending on the specific arcs and battles. Sometimes, it might seem like one is stronger in a particular situation, but that could change in another.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.