This code gives you a member card for the hotel! Here’s the code:

Enter this code in the AR:

94000130 FCFF0000
B21C4D28 00000000
B0000004 00000000
0000AA3C EDB88320
2000AA68 00000008
D2000000 00000000

Then after the game loads, press L+R and enter a pokemart. Their will be a bellhop dressed in green waiting to give you the Member Card.

You can buy an Action replay here. They are definitely worth it: