If you're looking for manga similar to Kinnikuman II Sei: Ultimate Muscle, you might like these titles.
A manga centered on Manami Toyota, a real life female professional wrestler.
Chinmi, an orphan who lost his parents in a tidal wave, is a promising sumo wrestler. Even though he did very well in the junior championships, none of the sumo scouts were interested in signing him because of his body, which is unsuitable for sumo wrestling, and also because of his weird sumo style. But luck comes his way when a small sumo school owner shows an interest in him and decides to take Chinmi into his school. There Chinmi begins his training to become a yokozuna...
Koitaro Samejima is a professional rikishi who, despite his love for sumo, has struggled with his small stature all through his career. Now, he is thinking about retiring, and he has 15 days to make the most out of it!
Momotaro is a masked wrestler and a descendant of his legendary warrior namesake. Combining the ferocity of pro wrestling with lighthearted gags, this manga knows how to make the wrestling ring exciting. Throw in characters based on famous figures from fables such as Kintaro and Urashima, and you have yourself a recipe for white-knuckle showdown!