What are some safe Action Replay codes for Pokemon games that you won't get punished with?

The only safe one would be event cheats because they place where it tells you where you caught it is correct unlike the Pokemon modifier cheats where you can catch it anywhere and in the data it tells you where it was caught, this will look bad if you wi-fi battle or trade that certain Pokemon. On the other hand all cheats are acceptable if you always play single player.