I think this concept assessment has run its course. The logical conclusions we can gain from this are that A. berries are the only item that you could conceivably use repeatedly, and B. they mandate harvest. The only real uses of this are Lum, Sitrus, and to a limited extent Chesto berry + harvest, but Harvest + Berry doesn't seem like a particularly strong concept. Especially due to Sun's nerf this generation, leaving the strat faced with being either A. making Charizard-Y mandatory or B. being shaky at best. It's a cool concept in theory, but the game just doesn't have the options we'd need to make it work.
Declined 1/2