This Seeking Tech guide will show you how to unlock the What Is He Saying? trophy in Astro Bot. You can do so by taking the following steps:
1. Go to the Truck of Funk stage.
2. Head to the puddle where the giant seed is facing to find a worm enemy.
3. After defeating the enemy, pull out the wires and then jump on the red button.
4. Hold R2 to direct the water to the giant seed.
5. Once the seed has grown to a tree, aim the water at its mouth to unlock this trophy.