GGs most well known LP is of Sonic 06. It still shows up when you search GG Sonic, at least it did when I searched.
In the post Jon years, Arin has desperately attempted to recreate the magic of that particular LP by playing as many sonics as possible. (Boom, Unleashed, Forces, Black Knight etc.) and blowing how bad they are completely out of proportion.
I know Sonic is hit or miss but pretending like the franchise is some huge dumpster fire where every game is Sonic 06 levels of bad is retarded. But we're talking about a guy who plays video games on the same skill level as DarksydePhil so it shouldn't be surprising.