Single post in Herbal Consumables for Lowering Happiness

I support. I'm hunting Eevee right now and I did a goof in putting my extra specials into a normal type field. Now that they're max happiness, I can evolve them into Umbreon/Espeon even though I don't want to evolve them. I'm worried I am going to accidentally evolve them while I am trying to evolve other Eevee for the tournament. I would definitely pay a little to make this not happen. The amount of money I would lose if I accidentally evolved a special is probably more than the money I would spend to prevent me from evolving them.