Instructions
Connect your Action Replay card to your computer via the USB card that came with the device.
Open your "Action Replay Code Manager" software from the start menu or the desktop icon.
Right-click the "My Codelists" panel at the bottom of the screen. A panel will appear, similar to if you right-clicked on the desktop.
Click "Add new code." A new window will appear.
Type the "Wild Pokemon Modifier" cheat in the window:
02064ec8 47104a00
02064ecc 02000031
94000130 fcfe0200
02066db8 47084900
02066dbc 02000001
d2000000 00000000
94000130 fcfe0100
02066db8 95019000
02066dbc 90022000
d2000000 00000000
62000000 95019000
e2000000 0000004c
95019000 90022000
1c28b40d f0684907
1c01fd4d 2901bc0d
4902d101 49024708
00004708 02066dc1
02066d9f 00000000
95019000 69384a04
98046010 4b019a09
00004718 02064ed1
0200002c 00000000
d2000000 00000000
Save the changes by clicking "Save" from the "File" options on the top toolbar. The changes will automatically be made to your Action Replay card. To activate the cheat inside the game, press "R" and "A" once inside the game. To deactivate the cheat, press "L" and "A" on the trainer screen from the game's menu.