Thank you.
I have finally gotten around to edit the main file based on the following information from the post that you sent
0x17E1C controls species ID. (90, 91 or 92)
Forcing it to other values will force the encounter to be Articuno.
0x17E23 0x20 Ready to Battle (also 20 when below 0x0B), 0x40 Captured/Defeated.
0x17E40 Stores roam encountered count (0x00 to 0x0B)
I changed 0x17E1C to 90 to try to get Articuno and this is the error that I am getting from the verify checksum
Invalid: 1F @ Region 17E00
SAV: 54/55