Sonic X The Final Season (2019) - made by rtgoh productions

Fun in the during...Sonic X The Final Season. the premieres in two-parter.

A Cosmic Call
A Metarex goes on a rampage on Earth, and it's up to Sonic, Knuckles and Tails to stop him.

Cosmic Crisis
Chris transforms into a kid after entering Sonic's world; Sonic learns the Metarex's true intentions.