1. Obtain the National Pokédex: You must have obtained the National Pokédex in the game. This is usually acquired after completing the main storyline.
2. Head to Johto: Heracross is found in the Johto region, specifically in Johto's Safari Zone.
3. Enter Safari Zone: Go to Azalea Town and enter the Safari Zone by paying 500 Poké Dollars.
4. Find Heracross: Heracross can be found in any of the areas within the Safari Zone, but it has a higher chance of appearing in the plains area. Use the Safari Zone mechanics to throw Safari Balls and catch it.
Here are some tips for catching Heracross:
1. Safari Zone Mechanics: When you enter the Safari Zone, you can only use the items provided, including Bait, Rocks, and Safari Balls.Bait can attract wild Pokémon closer, and Rocks can prevent wild Pokémon from fleeing.
2. Use Bait: Heracross is attracted to Sweet Bait, so use this to lure it closer to you.
3. Time Your Throws: Heracross has a relatively high catch rate, but it's still advisable to time your Safari Ball throws carefully. Throw when the wild Pokémon is closer and facing your character.
Remember to be patient and strategic when trying to catch Heracross. It may take some time and a bit of luck, but with the right approach, you'll be able to add Heracross to your Pokédex.