Here is the full list of all 20 The Swords of Ditto achievements.
Break the Curse of Ditto
Find all of Ditto's History Logs
Defeat Mormo with all of her Anchors active
Equip 12 limited edition Stickers
Complete a Dojo
Reverse time by a day
Complete an Offering
Defeat Mormo for the first time
Destroy all of Mormo's Anchors in a story
Destroy one of Mormo's Anchors
Get a limited edition Sticker from Ock
Swap a Sticker with someone on Ditto
Meet Serendipity
Find a Toy of Legend
Equip a limited edition Sticker
Open a crate
Equip a Sticker
Visit the grave of a failed Sword of Ditto
Upgrade your bomb capacity to maximum
Find all Toys of Legend