Zoo Keeper Unlockables and Secrets (DS)

Zoo Keeper is an online puzzle game developed by Robot Communications that was later ported to the Nintendo DS by Japanese video game publisher Success. The game was then brought to American and European shores by Ignition Entertainment. In Japan, before the release for Nintendo DS, the game was released on the Game Boy Advance and PlayStation 2 with alternative name "Zooo". The rules in Zoo Keeper are simple: your objective is to erase the animal symbols that fill up the screen by aligning them three or more in a row or column, while trying for a high score by erasing them in a combo. The level ends when each different animal symbol has been erased. Symbols are aligned by swapping one tile with one next to it. If this makes a line of three or more matching tiles with either of the swapped tiles, the tiles stay in this position and the line disappears. If no line of three or more matching tiles is formed, then the tiles swap back to their original position. Lines can be horizontal or vertical and combinations can mean that many lines disappear at the same time.

Unlockables

Extra hidden difficulty level
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.

Secrets

ILLUSION bonus
Hitting the 'ILLUSION' bonus will score you ‘1500000’ points.

Basically if you're ultra skillful and have a bit of luck this is possible to do. First you have to get 3 blinking tiles on the screen; next you must connect all three in a row, horizontal or vertical. After they have been connected, the screen will flash with a spark bursting out and the word 'ILLUSION - 1500000' in the center of the screen.

Note: This Bonus is also in GameBoy Advance Zooo.

Don't expect this to be some sort of tycoon, as it's only a puzzle but still a fun game to play. Check it out in the video below: