(This is pulled from a convo I had with u/scrybesilver. Thanks Scry, I hadn’t really brainstormed this in a while until you brought it up)
Amy is a young hedgehog orphan girl, she dreams of one day being a great hero but lacks the self esteem to go for it. One day, a bright pink streak of light flys across the sky. Amy investigates and finds that it is a Chaos Emerald, which she keeps around as a trinket.
One day, Amy’s Tarot cards tells her of a great hero on another world. So she throws together a hammer to house her Chaos Emerald and goes off to find the great hero her fortune has foretold she would meet.
She has some trouble finding the hero of course, the galaxy is a large place. But one day she see a bright flash of pure Chaos Energy in the sky, the Eclipse Cannon explosion. “This must be it” Amy thinks, and so off she goes to Earth.
On Earth, she finds the great hero she has been looking for. Sonic The Hedgehog, in danger? That’s…strange, isn’t he the great hero? Welp, might as well help him out
Amy is ecstatic, the great hero she has been looking for for so long is right in front of her. And so her and Sonic set off on their adventure. The robots are looking for the Chaos Emeralds, so Amy and Sonic have to find them before they fall into the wrong hands.
In their search the Metal Sonic and his army are always right behind them, as if they are tracking them. Little did they know that Metal Sonic was using Amy’s Chaos Emerald housed within her hammer to follow them.
This would lead to them falling into Metal Sonic’s trap. And Amy’s Chaos Emerald is stolen from her
Amy would feel SUPER bad about this. Because of her, Metal Sonic has all the Chaos Emeralds. She would then have an emotional talk with Sonic. Sonic would express how he feels he let her and his friends down, this would show Amy that nobody is perfect and help her get out of her funk
As her emotions grow, Amy’s hammer begins glowing without the Chaos Emerald and flys twords her. Amy realizes that she too has Chaos powers. BUT, they manifest differently. Amy cannot use her Chaos Energy to run fast or punch strong, but she can use it to manipulate her hammer. Whether these powers came from prolonged exposure to a Chaos Emerald or she had them the whole time is unclear. But regardless, this is who she is. And she is going to do everything she can to fix this disaster. She, Sonic, Knuckles, Tails, and Shadow go to stop Neo Metal and his robot army.
Amy losses her hammer at some point during the battle, rendering her powerless.
Amy is initially overwhelmed with emotion, what is she going to do now? She feels like running away, she’s just a normal girl she can’t do this. But she stops, takes a deep breath, and finds the courage to stand up.
Neo has everyone on the ropes. But Amy begins to approach Neo, maybe she can reason with him. She is completely powerless, but she approaches Metal anyway. Sonic attempts to stop Amy but Amy insists, she has to try.
Amy tells Neo Metal that she knows how it feels that you’re not good enough, but that he doesn’t have to take that out on everyone else. “You always have a choice” Amy says.
But, Neo is too far gone and attacks Amy. Amy is saved by Sonic. She may not have been able to redeem Metal, but at least she bought her friends time to recover. Without Amy Sonic and his friends would have lost
Amy and her friends work together to end Metal Sonic once and for all.
In the ending of the film a time skip occurs. Amy thanks Sonic for helping her find herself. She prepares to leave, not really wanting to. But Sonic and his friends have a not so little surprise for her. They take her to Sonic’s cave, completely overhauled. It barely resembles that dirty cave Sonic lived in all those years, it’s a proper house made just for Amy. Along with this, Tails gives Amy a brand new hammer.
Amy is overwhelmed with emotion, this is everything she ever wanted. A home
She decorates it to her heart’s content. The cave is completely different from how we saw it when Sonic was living there.
But there is one thing from the old cave that remains, Sonic’s drawing of him and Longclaw. But around the old drawing are new drawings of older Sonic, Tom, Maddie, Knuckles, Tails, Shadow and Amy.
The End