Throughout your journey, you'll find Professor Pickle's Research Notes scattered across the various hub areas. These aren't just lore; collecting them is crucial for unlocking new stages and progressing the main story. Each note provides a piece of the puzzle regarding Dark Gaia and the world's history.
- Location: Research Notes are typically found in plain sight within hub areas, often near landmarks or important NPCs. They glow with a distinct aura, making them easier to spot.
- Purpose: Once collected, bring them back to Professor Pickle in his lab (which moves to each new continent). He will decipher them, which is a prerequisite for him to unlock the next set of main stages.
- Rewards: Beyond story progression, delivering notes sometimes rewards you with EXP or rings.
Always keep an eye out for these glowing documents. If you're stuck and can't unlock the next stage, chances are you've missed a Research Note in the current hub area.