Rename one of your guests one of the following names to the reap rewards.
|Unlockable||How to unlock|
|All animal houses become available:||Name a guest Andrew Binder.|
|All scenarios are completed:||Name a guest Akiyama.|
|A lot of money gets donated:||Name a guest Bill Gates.|
|All Foliage becomes available:||Name a guest Charlie Peterson.|
|Improved animal fertility:||Name a guest Dr Dolittle.|
|All animal toys become available:||Name a guest Lou Catanzaro.|
|All endangered animals become available:||Name a guest Steve Serafino.|
|Some guests get sick:||Name a guest Zeta Psi Make.|
There are four bonus scenarios that are unlocked by completing a scenario on different difficulty settings.
- Very Hard
Rename on of your guests one of the following names and watch your buildings and guest's shirts change colour.
Mr. Blonde: They turn yellow,
Mr. Blue: They turn blue,
Mr. Brown: They turn brown,
Mr. Orange: They turn orange,
Mr. Pink: They turn pink,
Mr. White: They turn white,
The effects even stay after the guest has left the zoo.
at the title screen, do this with the D-pad:
Up, Up, Down, Down, Left, Right, Left, Right, and then repeat it once more and you should here a sound of an elephant (only if your volume turned up though)
Press the arrows:
UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, UP, UP, DOWN , DOWN, LEFT, RIGHT, LEFT, RIGHT
To unlock all animals, foliage etc.
Unlockable 4th difficulty, "gekimuzu".
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. This secret was found by mtpfreak and verified by bemani.