Sonic the Hedgehog ソニックと勇気のつるぎ (and The Blade of Courage)

Plot

The series follows Sonic the Hedgehog as he encounters kind-hearted primary school student Yuuta, the wielder of the legendary Blade of Courage. A blade with the power to slow things down, only able to be awakened by a courageous person. While trying to stop a train hijacker, Sonic helps Yuuta realize just how courageous he really is, enabling him to use the Blade. With the help of Sonic's genius best friend, Miles "Tails" Prower, Sonic and Yuuta team up to stop the nefarious Doctor Eggman from using the Crystallization Idol to Crystallize everyone in the world and get rid of all of humanity.