Hmmm. This time I’m actually going with the more popular choice. Shadow can beat Sonic. While Sonic’s fast Shadow is arguably faster. plus he has time manipulation powers that allow him to slow time and teleport. He also has his chaos spear attack which is a super strong energy beam. And if it comes down to it his Super form is stronger than Sonic’s.
Well not anymore. Sonic has more hax on his side. Sonic wins.
Fanfic version below