In 2021, Jakks Pacific releases a small version for Metal Sonic. They still don't have hi-spec (metallic) paint for any of him...even though the photo on the back of the box SEEMS to have his blue as a metallic color? Look at the difference between the figure itself & the photo on the box back.

It is, as is usual, a decent figure from JP. The red for the eyes they chose is very dark and so it does not contrast very much with the black eye-background / makes it harder to see. A brighter red paint might have imitated the glow better. Lack of metallic color also hinders the figure. Being small-line, it has 5 points of articulation (shoulder, hip & head) DO note that the 5 inch size of Metal Sonic DOES have both elbow AND knee joints.
This particular one has a paint flaw in the left ear, but others have been found with a flaw in the yellow engine part or in the eye. Be sure to inspect this in the store before you choose*.
The bottom of the box shows others that were supposed to be on this 'wave' of figures but Jakks Pacific does not seem to pay any attention to their own waves. They've got the Gold Chao turning up again, and Tails too. But now there's Moto Bug & Classic Sonic also revealed here. Because Target won't put these on the website, you have to just keep going to the store hoping to run into one you don't yet have.
*IF you even get to choose, distribution for this may not be so great, so if you want Metal Sonic just buy him if you see it because it is 5 dollars.