I'm surprised not a lot of people have mentioned the luxury it is to be able to register two items in HG/SS compared to the usual one.
In DPPt, my bike is the first thing I register and it's usually the one item that I keep registered for most of my playthrough. Other than that, I only change it if I'm in the mood to do other specific things such as fishing.
In HG/SS, my bike is always registered first and it stays registered the entire time. My second option is usually switched with other items I need to use at the time. On a normal day though, I just keep the Berry Pots registered in the second slot.
In DPPt, my bike is the first thing I register and it's usually the one item that I keep registered for most of my playthrough. Other than that, I only change it if I'm in the mood to do other specific things such as fishing.
In HG/SS, my bike is always registered first and it stays registered the entire time. My second option is usually switched with other items I need to use at the time. On a normal day though, I just keep the Berry Pots registered in the second slot.