Here is the full list of all 25 Klonoa Phantasy Reverie Series achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Complete the EXTRA VISION
Unlock all Achievements
Free all Residents of Coronia
Free all residents in Phantomile
Free all residents of Jugpot
Free all residents of Forlock
Free all residents of Wind Village
Defeat Nahatomb
Free all residents of Cress
Defeat Ghadius
Defeat Joka
Defeat Baladium
Complete the Chamber o'Fun
Complete the Chamber o'Horrors
Collect all Momett Dolls
Defeat the King of Sorrow
Defeat Cursed Leorina
Defeat Polonte the Hatchling
Collect 6 Momett Dolls
Defeat Mobile Tank Biskarsh
Defeat Leptio the Flower Clown
Defeat Folgaran the Armor Beast
Defeat Gelg Bolm
Defeat Evil Seadoph & Evil Pamela
Defeat Rongo Lango