No joke, I saw this topic under "Latest Posts," and I thought that the discussion was about playing the original Teenage Mutant Ninja Turtles: Turtles in Time or the delisted Re-Shelled remake for XBLA.
I apologize for not contributing more to this topic, but I'm no expert on reshelling GBA's. I guess it really comes down to 1) If you have the money and expertise for a reshell, and 2) If you feel reshelling is the best course of action.