Here is the full list of all 20 The Swords of Ditto achievements.
Complete a Dojo
Complete an Offering
Equip a limited edition Sticker
Defeat Mormo for the first time
Reverse time by a day
Destroy all of Mormo's Anchors in a story
Swap a Sticker with someone on Ditto
Destroy one of Mormo's Anchors
Meet Serendipity
Find a Toy of Legend
Open a crate
Equip a Sticker
Visit the grave of a failed Sword of Ditto
Get a limited edition Sticker from Ock
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