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