Expert Difficulty:
In Zoo Keeper, Tokoton 100, Quest and Time Attack modes record the top score.
Zoo Keeper:
1,200,000+ points needed
Tokoton 100P:
1,800,000+ points needed
Quest Mode:
10,000+ points needed
Time Attack:
600,000+ points needed
Extra Hidden Difficulty Level:
Unlock 4th difficulty, 'gekimuzu'.