Instead of Thunderstone, Glazed has Lightning Stone as a way to evolve certain Pokemon. You can find Lightning Stone in these locations:
* Route 107: This is the most common place to find it.
* Route 108: This is another location where you can find Lightning Stone.
* Victory Road: This is a higher level area where you might find it.
Remember that these are just possible locations, and the appearance of items is randomized in Pokemon Glazed. So, you might need to search these locations multiple times before finding a Lightning Stone.