Mozilla: I'm not taking anything from Expert Pack. I got two items already equipped, Ice Cream and a Pecha Berry. Hence I'm good for now even though I typically find myself in predicaments over my HP.
Alex: Keep Luminous Moss equipped and grab one of the Sitrus Berries(4 left) from the Expert Pack. Thanks to your move Refresh, you won't need Pecha or Cherri Berries. Not sure if you can use Chesto Berries when asleep though. Don't think you need a Leppa Berry since your only move with PP is Swift.
Lily: Equip the Big Root from Rinnia. This will buff your Absorb move with regards to recovering life. You still have a use of Suspicious Ice Cream left but what makes you deadly is your use of Magical Leaf and Sleep Powder. Therefore, take a Leppa Berry from the Expert Berry Pack so that you can replenish either move for the next battle.
Mercy: You already have Pecha and Persim Berries so take a Cheri Berry(1 left) to cover Paralysis. Shadow Sneak is unlimited use so you don't need a Leppa Berry and take a Sitrus Berry(3 left) so you can recover some HP. You still have 3 Sticks left so you have the option to sell them or keep them for future use.
Elwind: Already have a Lum Berry so take a Pecha Berry(1 left) and Cheri Berry(none left) to cover Status ailments. Since you're prone to taking damage and are a high value target, take the Mago Berry that will replenish half of your HP. You still have three Poison Spikes so either sell them or save them for when we face Fairy Type Pokemon.
Krakonos: With two Escape Orb's and the Cut HM, I'd sell the Cut HM if no one else is going to use it. Due to your Truant ability, it's rare for you to use an attack, much less an item. If I could, I'd trade those orb's for another Dynamite but it doesn't appear to be on the menu. Slack-off removes need for Berries and as for Status remedies, I think we can get by without them.
Felix: Your inventory is quite full and you have an Oran Berry that you've yet to use. Tack on Suspicious Ice Cream, Sticks and that Jetpack and I can't justify giving items from Berry Pack.
Cuddles: Take Sliggoo's Mystic Water from Nah and equip it. This will boost your Water moves by 15%, making you that much more deadly. With nothing in your inventory(despite what it says on page 1 since you gave your Oran Berry to Dawn), I think a Pecha Berry(none left), Chesto Berry(1 left) and Leppa Berry(2 left) would serve you well. Leppa is in the event you want to replenish Water Pulse. I think you can get by without a Sitrus Berry and if not, you can always ask for Felix's.
Nah: Only thing you have left is the Poke Doll after exhausting your Gravelerock last battle. I would either sell it to make room or make use of it next battle seeing as we're splitting up. To ensure more use of your skills, I definitely recommend grabbing a Leppa Berry(1 left), Lum(1 left) and Eggant(1 left). I think you can get by without a Sitrus Berry due to your Dragon Typing.
Freesia: Take and equip the Black Sludge item from Priscilla. Being the only Poison Type in the group means you're the only one who can take it. With an Aspear Berry to cure frost and a Fishing Rod left over, I'd grab a Lum(none left), Eggant(none left) and Chesto(none left) for Status ailments.
Priscilla: Your loot is being distributed to everyone else(Black Sludge to Freesia, Miracle Seed to Linus). What you get to keep is a Revival Herb(other one goes to Susato) and your Wand of Zapping that you've yet to use. Although I'd like to give you a Leppa Berry, there are only so many to go around but you're definitely getting s Sitrus Berry(2 left) because you're too valuable to lose. The rest of your inventory remains open because your ability is suited to going after treasure.
Coral: While I'd like to give you Big Root, you haven't learned Aqua Ring yet so there's no point to it and with just 1 Water move, Mystic Water would be better served on Cuddles. I'm also not sure if you even need anything with an Oran Berry, Lum Berry, Escape Orb and Slow Wand in your arsenal already.
Susato: You're the Group Healer and, if necessary, a reviver. As such, you'll be getting one of the Revival Herbs Priscilla found last battle. Your moves don't require a Leppa Berry and although we have two Sitrus Berries, I don't think you should be on the Front lines. So for right now, I think your inventory should remain empty(save for the Revival Herb).
Rinnia: After giving up the Big Root to Lily, your inventory contains a Pecha Berry and a Pokedoll. Since you're typically away from the front lines thanks to Confusion, you've been able to get by without recovery items. Furthermore we typically shield you from harm since you're our healer with Heal Pulse and since you can attack effectively for eternity with Confusion, you won't need a Leppa Berry. As such I think you can get by without anything new added to your inventory.
Linus: Your Razor Leaf will get a 15% boost from Miracle Seed once you equip it. However, from an offensive standpoint, your only moves are Astonish and Razor Leaf. As such, I think you should get the final Leppa Berry(none left) for Razor Leaf so that you can be more effective on the battlefield and take advantage of that Miracle Seed. Recovery wise you have Leech Seed so if necessary, use that to recover life to forego having a Sitrus Berry.
WooWoo: I was sooo torn on who to give the final Leppa Berry to but seeing as you have multiple attacks to draw upon and the fact I wanted to take advantage of Linus' new item, he got the needed edge in the end. Your phase movement also allows you to hide if you get into a pinch so I think you can forego a Sitrus Berry.
Mags: You presently have a Slow Wand and Corsola Twigs in your inventory. Due to your Steel Typing and the fact you can attack from afar or diagonally, odds are you won't be in a position to where you'll need a Sitrus Berry. Hence nothing coming your way from Berry Pack(sorry).
Lutin: Nothing in your inventory and nothing coming your way(sorry).
Meta: Gravelerock and Corsola twigs in your inventory with very useful offensive moves. You, for coming back to the party, get a Sitrus Berry(1 left)
Hit: Escape Orb, Fishing Rod and Wand of Zapping in your inventory(maybe sell Rod?), your offensive capability is compromised if you drop below 50% HP. As such you get the final Sitrus Berry(none left).
Robin: If you learn Recover, you won't need any Sitrus Berries. Furthermore you should be behind the lines lending Psychic support when you can.
Waterproof: New to the team, hence have to earn your keep as they say.