Hi, I want to run all cups and I want to try penta penguin but I cant find any code for it that works. Can you please help me and bring it that works for you? Thanks a lot.

This one worked for me on mednafen
In main menu: Hold L1 + L2 + R2 and press Left, Up, Right, Square, Triangle, Circle, X, Square, Right, Down

This code is correct but you have to hold all 4 shoulder buttons. For whatever reason Crashmania made a small mistake on their website which is usually the first result when you check Google

Thanks.

Thought I'd add to this thread as I came across this problem using Mednafen. Some emulator's or controllers might not accept all 4 shoulder inputs when trying to input the code so if anyone has this issue, a fix is assigning the shoulder buttons to your keyboard instead which worked for me.