You can play Fnf vs Sonic.exe Online in a99.io as unblocked.
We will see Sonic, one of Japan is national series characters, in Fnf and we will try to defeat him in Fnf. I hope you are experienced with other Fnf games. Otherwise, Sonic is a very fast character and you have to use all 10 fingers to race against him. You can use the arrow keys against Sonic. Fnf vs. I wish lots of fun and good luck to all players in Sonic.exe game. Fnf Mods