In the 90s, the local Taco Bells in Portland had a menu item called "Mexi-nuggets" which were a Mexican spiced tater tot. In the combo meals, they filled the role of fries like you get in your burger combo (like the two tacos and Mexi-nugget combo)
I was quite surprised to find out the stores in Washington didn't sell them, and instead of Mexi-nuggets, the combos just had... Another taco.