Zookeeper DS
Gekimuzu Difficulty:
To obtain a 4th difficulty, you need to get the highscore
on all 4 modes of gameplay.
Zoo keeper – 1200000+ points needed
Tokoton 100 – 1800000+ points needed
Quest mode – 10000+ Yen needed
Time attack – 600000+ points needed
After getting all 4 high scores, a 4th difficulty appears
in the top line of the option menu. This difficulty means
“Expert” or literally “difficult-player” and has a huge
advantage of doubling all the normal points you achieve.