Here is the full list of all 50 LOST SPHEAR achievements.
In-battle move distance reached 1000D.
Made 10 evasions.
Ship acquired.
Collected from Glow Spots 100 times.
Made 15 weak-spot attacks.
Made 10 Momentum Kills.
Damaged 3 or more monsters with 1 attack.
Activated Momentum Mode 10 times.
Activated Momentum Mode 4 times in 1 battle.
Went fishing 30 times.
All achievements earned.
Vulcosuit acquired.
Winger acquired.
Night and day restored.
Sea restored.
Royal Capital Marche restored.
Returned from the Fade Realm.
Landed on the moon.
Unlocked all spritnite columns.
Defeated Krom.
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.
Made 10 Machine Kills.
Made 30 consecutive hits.
Caused 500 or more damage with 1 attack.
Caused 1,000 or more damage with 1 attack.
Made 100 critical hits.
Caused 10 sublimations.
Sublimated spritnite to max level.
Used all paradigm drives.
Defeated 300 monsters with Scan.
Created spritnite 50 times.
Created 10 artifacts.
Ate 100 different foods.
Money spent reached 500,000G.
Total shop sales reached 100,000G.