Question

Where do you find heracross' mega stone?

Answer 1

in the early entrance of santalune forest. Only on Y, post game.
Hope I helped!

Answer 2

The Heracronite is exclusive to Pokémon Y only. You can find the Heracronite in Santalune Forest in a patch of grass in front of the initial entrance to the forest (post-game.)

Source: http://bulbapedia.bulbagarden.net/wiki/Santalune_Forest

For more help finding the Heracronite click on this video here.

Note: It must be between 8pm and 9pm in the game for the stone to appear.

Hope I helped :)

Answer 3

if your game is y, you need to go to santalune forest, go straight forward from if you come from the entrance from aquacorde town and look to the left . you need the upgraded mega ring.

hope I helped:)
source

Comments

i do have the upgrade and my game is y. thanks for the answers!