Nagato first uses his Rinnengan when he was young. Look what he did to this guy. He is bleeding internally.
When Jiraiya asked him about it. Nagato said that he "Went out of his mind" and he "Blacked Out"
I think that Nagato is sitting in his wheelchair because he blacks out when he uses the Rinnengan, and transfers himself into another body. I think that is how he killed the ninja when he was young. It also explains why when he stabs someone with that black antenna thing... his eyes appear in that person's mind.
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When Jiraiya asked him about it. Nagato said that he "Went out of his mind" and he "Blacked Out"
You must be registered for see images
I think that Nagato is sitting in his wheelchair because he blacks out when he uses the Rinnengan, and transfers himself into another body. I think that is how he killed the ninja when he was young. It also explains why when he stabs someone with that black antenna thing... his eyes appear in that person's mind.