(Question: How would they surprise their s/o on their birthday?)
Amy always try to make Sonic’s birthday super special. She hangs streamers, blows up balloons, bakes the cake, buys ice cream, and makes tons upon tons of chili dogs.
Once Sonic shows up, she tackles him in a hug and immediately starts singing. The lights are out and the candles are lit on his cake. Sonic gladly blows them out and gives the pink hedgehog a big hug along with a kiss.
For Amy’s birthday, Sonic gets her an ice cream cake and some cupcakes. He goes out and picks some roses for her and puts them in a vase next to her cake. Once she arrives, he scoops her up and spins her around with rose in his mouth. He puts her down, gives her the rose, and kisses her.