Character comparisons Pop

In this book one of the main character helps the MAIN character play football better. His name is Charlie, he was actually in the NFL. But one thing is he forgot all of that because he has Alzheimer's and doesn't remember anything, but he remembers how to play. He is just like the character Dory from Finding Nemo because they both forget their memories but are still a crucial character in which they both help the main character get to their main goal. The differences, one big one is that Dory is a fish and Charlie is a man.