Latios or Latias
Press Start + Select while in the green house above the Vermilion City's Gym, then exit.
94000130 FFF30000
B2111880 00000000
20001054 00000001
20001133 00000019
D2000000 00000000
this is a rebattle code for the action replay ihad the same problem and it was driving me insane. i registered just to post this due to the fact that it was soannoying for me. lol