Pikmin 2 - Glutton's Kitchen (No Deaths)

Sublevels: 6
Treasures: 14
Hazards: Electricity
Boss: Giant Breadbug
The second cave you can reach in the Perplexing Pool. This one has tons of electric enemies, so a good supply of yellow pikmin is recommended and, as usual, whites and purples.
The scariest threat in this cave is the Spotty Bulborb found on sublevel 4. This creature will roam around the map with the smaller dwarf bulbears. You can use a bitter spray if worst comes to worst.
The boss is a new enemy, the Giant Breadbug. It behaves like a regular breadbug, it just has more HP and is more powerful, so you'll need purple pikmin to wrestle the treasure off of him.