The narrator wanted a brother that could do things with him like running,playing, and walk.
The narrator wanted to teach his brother how to walk and do the things he did.
The narrator shows him what he has been through.
The narrator sees the scarlet ibis that just landed and was very tired looking.
When the narrator goes inside with doodle they can see that the scarlet ibis died after all its work.
The narrator and brother were working hard to let him be like a normal kid and where working when a storm came and they ran to they house but doodle fell and cried for the narrator and when the narrator came he found doodle died and he called him his Scarlet Ibis.