Here's why:
* Game Design: The emeralds are meant to be collected through gameplay and are a core part of the game's progression.
* No Built-in Cheats: Sonic 3 & Knuckles doesn't have a built-in "cheat code" system like some other games.
How to Get All Emeralds Legitimately:
1. Complete Levels: Collect all the Chaos Emeralds hidden in each level by finding the special stages.
2. Special Stages: Enter special stages by collecting 100 rings and then hitting a spring.
3. Super Sonic: Collect all 7 emeralds to unlock Super Sonic, which makes the game significantly easier.
Important Note: There are some third-party tools and mods that can potentially give you all emeralds, but these are considered "cheating" and may not be compatible with all game versions.
The true challenge and fun of Sonic 3 & Knuckles comes from earning those emeralds through your own skill and strategy!