Here's a Sonic X shirt that's somewhat out of place. It's been years since Sonic X was freshly on TV, yet in the summer of 2009, they still produce a shirt with 3 X exclusive characters Chris, Bocoe and Bokkun. It also has Emerl who first appeared in the GBA Sonic fighting game. Sonic is on those mysterious rocket-shoes again which first appeared on the 15th anniversary shirt. Knuckles is in the background as well, blending a bit with the red starburst effect and Chris' shirt.
This is available at Sears in 2009, but the popularity of the design is somewhat low, due to giant Chris.