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