Things You'll Need
Instructions
Go to Floaroma Town. Go to the northwest or top left corner of the screen and through a field of flowers to find a pair of trees or an entrance. Enter the trees to go to the garden. Purchase "sweet honey" from the man working in the garden. He will sell it for 100 Pokedollars.
Leave the garden. Head east to Sinnoh by traveling to the right of the screen until you find a lone golden-leaved tree. Set a "honey trap" on the tree by pressing "A" to spread honey on it. Leave the tree for 12 game hours and find the other honey trees that are scattered around Sinnoh. The honey trees are the trees that have the yellow leaves.
Save your game. Return to the first honey tree. If it is shaking side to side or rustling, select it by pressing "A." The faster or harder it is shaking, the better chance there is of you finding an aipom. Go to all the trees you baited with honey. If you don't find an aipom, reset your game and try again.
Catch two aipom, one male and one female. Place them in the "Pokemon Day Care." Visit them every day and eventually there will be an aipom egg.