The story where the Hulk grows through his rivalry with another powerful character can be very interesting. Their battles force him to constantly improve. He starts to study his opponent's moves and adapts. This growth is not only physical but also in his intelligence. He figures out how to use his environment to his advantage and his power spikes as he gets closer to defeating his rival.
One Hulk anime growth story could be about how he starts as a regular, albeit strong, character. As the story progresses, he faces tougher challenges that force him to tap into deeper levels of his strength. For example, when his friends are in danger, he overcomes his initial limits and grows both in power and in his ability to control his rage.
Sure. Consider an anime where a male is born with a genetic quirk that gives him Hulk - like muscle growth potential. He is bullied in his childhood for being different. But as he grows, he decides to use his power to help others. His story of rising above the bullying and using his unique ability for good is very inspiring.
Sure, She-Hulk is related to Hulk. Jennifer Walters, aka She-Hulk, got her powers because of a blood transfusion from her cousin Bruce Banner, who is Hulk. This connection is a key part of their storylines in the comics.
Captain America would be a great addition. His leadership and moral compass could guide Hulk and She - Hulk when they face difficult decisions. And his combat skills could come in handy during battles.
One popular one could be where a male character, inspired by the Hulk's concept of muscle growth, trains really hard in an anime world. He might face various challenges like powerful enemies. As he overcomes these, his muscles grow, symbolizing his growth in strength and character.
In 'My Hero Academia', characters like All Might in his prime had a very muscular physique which was a sign of his great power. His backstory involves training and developing his 'One For All' quirk which also led to his physical development. This can be seen as part of a muscle growth - like story in the anime world. Also, many of the students in the academy train hard to improve their abilities and physical strength, similar to the idea of muscle growth for male characters in an anime.