Second question. I turned on categories in my inventory and it has me curious. Can anyone tell me what use (if any) these items have? Or are they just quest items I should sell?
"Account Upgrade" ???
If you see an ordinary item listed as an account upgrade, it's a mistake! Feel free to point them out here or in another thread in Problems and Bugs. It looks like the Cavalli Brand Bass A String is miscategorised too. x) A lot of items don't really 'do' anything - they're used as quest fodder or placed into pet treasure chests (TCs) to bring their stories to life.
There are a couple of other areas around the site where you can combine items: there's also the genetech lab (see here for combos) or the alchove for zombies.
Have fun baking! c:
Thanks so much! Is there a way for me to access The Alchove as, well, currently a non-zombie?
If you have any saved zombie skins in the wardrobe, you can put one on to access the Alchove whenever you like. If not, you can wait until next February to collect a couple of skins. c: Otherwise you can ask people who have zombie skins (I'd be happy to!) to make items for you by giving them the items you want combined and then receiving the finished product afterwards. Or you can buy the items on the shop search, but that's more expensive.
Right now just about every ingredient in Baking at Fantine's is super outrageously egregiously stone-cold-sucker overpriced. You might want to wait a bit for prices to drop.
Scrolls can be made at the Secluded Shrine. Treasure and Uncharted Maps can be made at Games/Maps. Frankenpie Frankencluck and PCs can be made from your Inventory.
There are some Vials that will make you slowly naturally ill. When you are at maximum illness you can fool Zosi into thinking you are a zombie and you can use the Alchove. This only lasts for a few days, then you get slowly better.