Here is the full list of all 49 99 Spirits achievements.
Free an Area from Evil Influence
Complete Chapter Six
Complete Chapter Five
Win 500 in a Single Gamble
Running Is a Victory
Find All Stone Statues in a Single Playthrough
Win a Gamble
Master a Tsukumogami
Complete Chapter Four
Reach Level 10
Win 100 Battles
Amass a Fortune of 20.000
Sell 50 Items
For Big Eaters
Complete Chapter Three
Identify an Enemy Without Any Hints
Complete Chapter Two
Wake up Dozing Hanabusa
Complete Chapter One
Learn All You Can Before Setting Out
Win a Battle Without Missing a Single Counter
Complete Chapter Seven
Complete Chapter Eight
Complete Chapter Nine
Complete Chapter Ten
Complete Chapter Eleven
Free the World from Evil Influence
Pay Your Respects
Get to Know the Monk
Get to Know the Merchant
Travel 5000 Steps
Reach Level 20
Reach Level 30
Reach Level 40
Reach Level 50
"Acquire" a Mystical Item
Vanquish a Great Monster
Vanquish all Great Monsters that Roam the Land
Amass a Fortune of 100.000
Save a Damsel in Distress
Walk a Tranquil Path
Walk the Path of Asura
Index All Tsukumogami
Receive the Spirits' Blessing
For Those Who Reached the End
For Those Who Saw It All
Maximum Utility, No Nonsense
Defeat the First Boss Without Using Items
Show Proof of Mastering the Use of Gems