Sonic Alliance

"Lincoln Loud and his friends, along with the Sonic Alliance, led by Sonic the Hedgehog, made a plan B for us, after such failures could lead to temporary setbacks on our road to friendship, happiness, liberty, freedom and democracy."

--Su Ji-Hoon, Plan B

The Sonic Alliance is the third-best member alliance of Grand Alliance after the Future Alliance and the Girl Union. All of its members are non-preschool heroes to save the world.

The leader of Sonic Alliance, Sonic the Hedgehog, can fight for the Preschool Girls, the Grand Alliance, and some its allies, mainly from the Swords of Sanghelios, led by the evil Dr. Eggman and the Eggman Empire.