Catch Safari Zone Pokemon outside of the zone
From Glitches
From the games Pokemon Red/Blue and Pokemon Yellow for the Game Boy
This is similar to the copying items glitch. Go to the Safari Zone and fight some Pokemon. Now, leave and fly immediately to Fuschia town. Make sure you don't run into any other Pokemon in patches of grass. Go downwards and then surf down and to the left, past the swimmers. It's okay if you fight some wild pokemon in the water. When you get to the island, surf up and down the right edge of it. You will encounter some safari zone pokemon and be able to catch them normally! This works with most patches of grass... if you hang out in the grass and fight pokemon there and then go down to the island, you will find the same pokemon.
Submitted by: kornyhatemachine