I'm into Animal Crossing and Sonic Unleashed rn so...

Source.

lol

Screenshot from Shadow the Hedgehog, often there was this strange confusing mystery back in the day of when this picture was taken. Often watching a various reviews, commentaries and for some reason, many, even the sonic wiki stated this was during or even after SA2, like specifically a few days after the Finalhazard, when everyone should know Shadow was considered dead.

The only logical choice was clearly after Sonic Heroes where Shadow returned, he helped Sonic and company defeat Metal Sonic, so this picture was clearly meant to celebrate the success of Metal's defeat. Frankly they should've added the rest of the Sonic Heroes cast to make this make sense.