Here is the full list of all 50 LOST SPHEAR achievements.
Defeated Krom.
Winger acquired.
Created spritnite 50 times.
Royal Capital Marche restored.
Unlocked all spritnite columns.
Made 30 consecutive hits.
Caused 10 sublimations.
Caused 1,000 or more damage with 1 attack.
Made 100 critical hits.
Went fishing 30 times.
Created 10 artifacts.
Sea restored.
Caused 500 or more damage with 1 attack.
Night and day restored.
Money spent reached 500,000G.
Vulcosuit acquired.
Made 10 Machine Kills.
In-battle move distance reached 1000D.
Collected from Glow Spots 100 times.
Ship acquired.
Made 10 evasions.
Made 15 weak-spot attacks.
Made 10 Momentum Kills.
Activated Momentum Mode 10 times.
Activated Momentum Mode 4 times in 1 battle.
Damaged 3 or more monsters with 1 attack.
All achievements earned.
Returned from the Fade Realm.
Landed on the moon.
Defeated Eclipse.
Defeated Dark Ruin.
Obtained Moon's Soul.
Obtained Rainbow Spritnite.
Obtained Sunlight Spritnite.
Obtained Chrono Spritnite.
Obtained War Maiden Spritnite.
Obtained Tyranny Spritnite.
Obtained Raggys' Spritnite.
Obtained Isolation Spritnite.
Ate Clam Soup.
Ate Moon Tripe.
Ate Fruit Jelly.
Used Last Elixir.
Turned into rooster.
Money acquired reached 1,000,000G.
Sublimated spritnite to max level.
Used all paradigm drives.
Defeated 300 monsters with Scan.
Ate 100 different foods.
Total shop sales reached 100,000G.