Can Heracross only be gotten in Diamond Pearl OR Platinum?

Slather Honey on the yellow trees. Heracross has a 4% chance of appearing. I recommend slathering Honey on every tree you see, waiting 6 1/2 hours, and checking all the trees you slathered Honey on. Changing the DS time settings will not work, as the game cartridge has its own clock, and will detect if you changed the time