Pikmin 2

- There's no day limit, so play at any pace you like.

- Use both commanders in a group when picking Pikmin to get it done faster.

- When you examine a cave, you'll see what kind of hazards it contains, and thus what kinds of Pikmin you need.

- Throw purples on top of creatures to stun them. This makes killing lots of creatures ridiculously easy.

- For reasons unrelated to the last tip, make purples whenever you can and try not to let any die.