Ni no Kuni: Wrath of the White Witch
34 Achievements
80-100h
Mad Scientist
Awarded for alchemizing 120 different items. Details for this achievement will be revealed once unlocked
2.9%
How to unlock the Mad Scientist achievement in Ni no Kuni: Wrath of the White Witch - Definitive Guide
http://www.gamefaqs.com/ps3/998014-ni-no-kuni-wrath-of-the-w...
It's not my faq, but I found it helpful, so I thought I would pass it along.
This one may take a while. There are 134 different recipes so the trophy will pop when you reach ~90%. When you go to your pot to make items from recipes, you can see the ones you have made have a picture of the item instead of a question mark icon. However, the recipe won't appear until you've found pages for it, and you may not find all of the pages. Use this (credit to Ryukori): LINK to look up the recipes, make them manually and then keep track of the recipes you have created. The items you make from manually choosing materials do count towards your total.
This page (World Map (IGN)) has a map of all harvesting points (blue markers) as well. There are a few items that can only be obtained from harvesting, so it will be worth your while to figure out which ones you need, and after every level (or any farming session), take Tengri and make a round of all the relevant points. If you need to harvest one a few times, harvesting points respawn after a certain number of battles (different per location). Keep an eye on Jade Marble and Power Stone, because you'll need quite a few of those, and it's easier to make sure you stockpile them (and everything else) when you have the chance.
Once you have beaten the game, golden Familiars will start spawning in every dungeon. These drop new SUPER rare materials (7 different ones), used in a lot of later recipes. You should be able to get to 120 without needing to farm too many of these items (though you will need to finish recipe 60 which requires a few, see Super Hero). These 7 items are: Glowstone, Evil Eye, All Seeing Eye, Troll's Tears, Angel Wings, Kaleidostone, Scroll of Truth. Aside from recipe 60, you can skip most recipes containing these items and just focus on completing the rest.