Monster Rancher Advance Cheats for Gameboy Advance
At the Shrine, enter 'Infinite'
At the Shrine, enter 'pal'
Here is the most powerful monster you can get in the beginning when you can only type in four letters at the Shrine. Go to the Shrine without a monster and go to "Tablet". Once you're there, type in the code "m5 ". It's a lower case 'm', a 5, and two spaces. It'll make a Tiger that looks normal, but his stats like intelligence, power, etc. Are all in the 200's.
Enter KEEPSLY if you want to get a raptor type monster that is black, my second one is to be able to get durahan get a Vioscizzor and train it up and fightwith it.