Shadow movie

After Shadow sacrificed himself but survived thanks to his immortality, he came to Sonic and told him he was alive. Sonic was overjoyed.
Shadow didn't live with Sonic's family (Maddie, Tom, Tails, and Knuckles), preferring the outdoors. He slept on rocks in a cave or on thick tree branches.
One rainy day, Sonic was sitting in his attic, which had been assigned to him personally. He was wrapped in a soft blanket, reading comics.
Looking out the window, he noticed a red flash running near his house. He felt sorry for Shadow, because he was all alone in such a rain.

When Shadow arrived at the APK lab, he met Maria, Gerald Robotnik's granddaughter. She became like a sister to him and taught him a lot. But later, she was partially killed by APK workers, and Shadow was placed in stasis for 50 years. (He's still 15, but his body is 65, meaning he's been around for 65 years, but mentally and developmentally, he's 15.)

there was a glitch and he was able to get out.
At first, Shadow was against Sonic and his family, as well as against the entire planet, but Sonic reminded him of the right choice and the things that Maria told him.
Together they saved the Earth, but Shadow sacrificed himself. Thanks to his immortality, he survived.

Maddie and Tom are humans, they are married, and Sonic found them and asked for help. Now they are his parents. Later, Tails and Knuckles joined them. They are also almost part of the family.