Sorry, this is kinda a stupid question, but over here http://Pokemondb.net/pokebase/72700/if-you-use-fling-in-wi-fi-battle-will-you-get-the-held-item-back Mew:3 said you get back ANY item used in a Wi-Fi battle. I don't think Mew:3 really meant that about Berrys as well, but I want to check.
Mew was right and what he said also includes Berries and one-turn Hold Items such as the White Herb.