Here's why:
* GameShark codes were primarily used for older consoles. Eternal Poison was released for the Sega Saturn, and while GameShark codes existed for that console, they were mainly for 2D games. Eternal Poison is a 3D RPG, making it more difficult to create effective cheat codes.
* The game's mechanics are complex. Eternal Poison features a unique battle system and a vast world to explore. Creating codes that don't break the game's balance would be challenging.
* The game is not widely played. While a beloved title among some, Eternal Poison's fanbase isn't as large as other Sega Saturn titles. There's less incentive for code creators to focus on this particular game.
While official codes aren't available, you might find unofficial codes or mods in online communities or forums dedicated to the Sega Saturn. However, these codes may be unreliable or potentially unstable.
If you're looking to experience the game in its intended difficulty, enjoying the challenge and exploration it offers is recommended. You can always find walkthroughs and strategies online for help with specific sections.