Not much about his childhood is known.
He is always energetic and optimistic. He gets along with Tenma very well. He is very determined and likes soccer very much. However, on Episode 28, he steps away from soccer because Kidou made him train harder than the others, which he resembles as 'mean'. He also stated that he won't come to practice on the third day since Kidou was in charge, along with Amagi and Hikaru (though Hikaru was just carried along by Amagi). He said that someone like Tenma won't understand how he feels, so he barely talked to him for half of the episode. Later that same episode, he came back to his true personality and kept fighting to the very end. However when Endou left for unknown reasons, Shinsuke was depress even when he was learning to be a goalkeeper. He wanted Endou to help him with the task but was surprised when he met one of Endou's friends ,Tachimukai Yuuki, who give him good advice on how to be a good goalkeeper. It's was Tachikawa's advice that made Shinsuke master Majin the Hand. He is also knowledgeable about dinosaurs.
He has a small body and wears a light blue headband over his light brown hair. His height is similar to Angelo Gabrini. His hairstyle is similar to Endou Mamoru's, although it also seems to resemble a rabbit's ears. He's the shortest of the team. He has maroon eyes. His outfit as a goalkeeper is the third kind, having black with yellow sleeves and a black short pants unlike the other two goalkeeper uniforms in Raimon.
In the France era, he wears a green T-shirt with some golden lines over a black shirt. His trousers are white and he wears black long boots with a golden line under the boots. In the Jurassic Era, he wears a green-brown shirt with gray lines and without sleeves. In the shoes are green-brown with a gray line too. In the King Arthur Era, he wears a white, brown and black knight uniform. His cape is red and he also has a sword. When he is Mixi Maxed with Ryuu Gentoku, his hair becomes blue and longer and his hair falls over his headband. His headband becomes white and shorter with some lines in the headband. His eyes don't seem to change color.
He first appeared in episode 3 where he was seated beside Matsukaze Tenma to which they attracted attention when Nishizono talked too loud to Matsukaze. Afterwards, they immediately became friends. He also came with Matsukaze to his house and said that it looked old and shabby, but quickly after hearing Kino Aki, he changed his words and began to marvel at the house. They were given food from Aki and talked with her in Tenma's room. Later, he joins Raimon by taking the entrance exam for the club along with Matsukaze and succeeds in being chosen.
Shinsuke is one of the only members who helps Raimon, along with Tenma, in the matches against Tengawara and Mannouzaka. In episode 14, he wanted to create a new hissatsu technique for himself, so he decided to train with Tenma, Sangoku, Kurumada, and Amagi. He said "I wanted to be more useful to the team". In the end, he was able to create Buttobi Jump. In the match against Teikoku, he scored a goal with Buttobi Jump, and Raimon won with 3-2.
In episode 20, he scored the final score against Kaiou with Buttobi Jump. In the end, Raimon won 4-3.
In episode 21, he scored against Akizora Challengers. At the end, they won too.
In episode 22, at the match with Gassan Kunimitsu, he sits on the bench, his position being replaced by Kariya Masaki. In episode 23, he replaced Kurumada in the second half, due to his jump strength. And Raimon finally won 3-2.
In episode 25, he is seen laughing after one more hissatsu name given by Kariya just before the game against Hakuren.
In episode 27, Shinsuke along with Kirino Ranmaru attempt to block a shot. They fail to block it completely however, though they lessen the force enough so that Tenma could stop it.
In episode 28, he is seen to be struggling the most in Kidou's new training when he was appointed as the new coach. He severely trained himself so that he can catch up with the others.
In episode 31, he and Kariya did his new combination hissatsu called Kattobi Defense and he blocks Sousuke's shot.
In episode 32, Shinsuke says that he wants to have his own Keshin, that is why he was practicing along with Tenma, also both him, Tenma, Shindou, Akane, Aoi and Midori then started to have flashbacks about the past matches they have had. With this, Shinsuke was more determined to have his own keshin.
In episode 35, Shinsuke played as goalkeeper for the first time. He was shocked after hearing Kidou saying that he will be the goalkeeper stating maybe he won't be able to block the ball but at the end, he was able to block every single shoot that Genei Gakuen did. At the end of the episode, he was happy when Raimon won the match.
In episode 37, Tachimukai helped him to become a great goalkeeper, like Endou, though he can't stop hissatsu techniques like Sidewinder or Sonic Shot. But finally, when Tsurugi used his keshin and his keshin hissatsu, he stopped the shoot with his keshin, though it was not complete.
In episode 38, he first played as a defender against Arakumo Gakuen. He found a way to pass the Desert Stadium's sand pits and used Sky Walk. Then Kidou and Sangoku decided Shinsuke should be the goalkeeper, because Sangoku couldn't stop Amemiya Taiyou and his Taiyou Shin Apollo's Sunshine Force. He tried to use his keshin and succeeded. He stopped Heavy Aqua Lance and Sunshine Force, but failed to stop a simple shoot from Taiyou because it was a feint, so Arakumo Gakuen easily scored the third goal. At the end, Raimon won 4-3.
In episode 40, he and the rest of the team went to the hospital and he was sad about Shindou can't play in finals along with Raimon. Later, he and the rest weren't focused on the training. He was also happy when he saw Coach Endou was back. In episode 43, during the second half of the final against Dragonlink, he was switched Sangoku was injured. He used his keshin many times to stop Dragonlink's Keshin shoots but failed two times, even using Majin The Hand, because at the end of the episode, he was so tired that he couldn't use his keshin anymore.
Inazuma Eleven Chou Jigen Dream Match
- Japanese : Haruka Tomatsu
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- all information on Nishizono Shinsuke came from http://inazuma-eleven.wikia.com/wiki/Nishizono_Shinsuke