italics = done after all the optional quests are done

bold = last & final quest

• Where's Putty? (Cactus Diary 4)
• Diddle's Letter (Cactus Diary 6)
• Two Torches (Cactus Diary 7)
• In Search of Faeries (Cactus Diary 11)
• Teatime of Danger (Cactus Diary 12)
• Star-crossed Lovers (Cactus Diary 13)
• Mine Your Own Business (Cactus Diary 14)
• Pokiehl: Dream Teller (Cactus Diary 15)
• Diddle Kidnapped!? (Cactus Diary 16)
• Heaven's gate (Cactus Diary 17
• Diddle Had It! (Cactus Diary 28)
• The Looking-Glass Tower (Cactus Diary 21)
• Two Pearls (Cactus Diary 22)
• Cosmo (Cactus Diary 24)
• Can't Look Back (Cactus Diary 25)
• A Siren's Song (Cactus Diary 26)
• Summer Lovin' (Cactus Diary 27)
• Drowned Dreams (Cactus Diary 28)
• Fluorite (Cactus Diary 29)
• The Lucky Clover (Cactus Diary 31)
• Alexandrite (Cactus Diary 32)
• Teardrop Crystal (Cactus Diary 33)
• The Quiet Sea (Cactus Diary 34)
• The Treasure map (Cactus Diary 35)
• The Dragon Princess (Cactus Diary 37)
• The Guardian of Winds (Cactus Diary 38)
• The Ghost of Nemesis (Cactus Diary 39)
• The Crimson Dragon (Cactus Diary 40)
• The Fallen Emperor (Cactus Diary 41)
• The Blessed Elixir (Cactus Diary 42)
• Seeing Double (Cactus Diary 43)
• The Cage of Dreams (Cactus Diary 44)
• Niccolo's Business Unusual: Part 2 (Cactus Diary 45)
• Niccolo's Business Unusual: Part 3 (Cactus Diary 46)
• Niccolo's Business Unusual: Part 4 (Cactus Diary 47)
• Niccolo Calls It Quits? (Cactus Diary 48)
• Li'l Cactus (Cactus Diary 49)
• Rachel (Cactus Diary 50)
• The Nordic Snowfield (Cactus Diary 51)
• Buried Treasure (Cactus Diary 52)
• The Path of the Blacksmith (Cactus Diary 53)
• Enchanted Instruments 101 (Cactus Diary 54)
• Golem Go Make 'em (Cactus Diary 55)
• Gilbert: School Amour (Cactus Diary 58)
• Gilbert: Resume for Love (Cactus Diary 59)
• Professor Bomb's Lab (Cactus Diary 60)
• Watts Drops the Hammer (Cactus Diary 61)
• The Seven Wisdoms (Cactus Diary 62)
• The Field Trip (Cactus Diary 63)
• Catchin' Lilipeas (Cactus Diary 64)
• Gilbert: Love is Blind (Cactus Diary 65)
• The Wimpy Thugling (Cactus Diary 66)
• Pee-Wee Birdie (Cactus Diary 67)