A Bug's Life Part 14: The Final Battle

And so we begin the events of the movie's climax. Hopper is an enemy in all three of these stages. In spite of this, he won't count towards our kill count in any of these stages, so focus on everything else. This is the first and only stage in the game not to feature the Gold Berry, or even the Purple Coins to produce one. So to kill everything, we need to do the following:

1. Grab all four Green Coins
2. Use the Lv. 4 Beanstalk to reach the four Blue Coins and first Yellow Coin
3. Gain the Super Jump (and preferably the Bug Bubble for protection)
4. Hop up to the Food Alter to reach the Brown Coin
5. Use Flower Turrets to shoot down first Flying Grasshopper.
6. Turn the planted Seed into a propeller and launch seed to alter.
7. Turn seed into a turret to shoot down grasshopper.
8. Bring both seeds back to ant hill region, and nab both Yellow Coins.

Do all that, and you'll unlock the Bug Mine which is the only other way besides the Gold Berry and Harvester to permanently exterminate all the enemies on the stage. So do all that, pick up the Grain, and letters, and then shoot down Hopper to save the Princess. One stage down, two to go.