Zoo Keeper

Using the Touch Screen, players tap the Nintendo DS stylus to swap the
positions of animals on the screen to create lines of three or more of
the same type. These animals are then "captured," allowing other animals
to fall into their place. Zoo Keeper includes a variety of play modes to
ensure that gamers have depth of gameplay. Players also can take
advantage of the DS Wireless Communication to play simultaneous
two-player modes that only requires one Nintendo DS Zoo Keeper Game Card.

Zoo Keeper is a fun puzzler that gives you two screens of challenge. Use
the DS touch screen to swap positons of the animals, creating rows of
three or more. When you do, they'll be "captured" and new animals will
fall into place. It's easy to learn buthard to master, like all the best
puzzle masters - pick it up and see how you do!