It has to be a golden tree and a sweet smelling tree
no you can only use it on a sweet-smelling tree
Use the move sweet scent or use honey
to find one you have to use the sweet honey trees.
you can get them in honey trees. but you need honey
I think it takes a day or so ingame.
No, this is not true. The only way to get Mew in Pokemon Diamond and Pearl is to migrate it from another game or use cheats.
Honey Trees.
yes you can. the more honey you put on the tree, the chances a rarer Pokemon will be there.
When you use honey on a honey tree, Pokemon will appear 6 to 24 hours later. Once 24 hours have passed, the Pokemon will not be there.
Sweet Honey Trees
Buy honey from Floarama and then when you see a brown tree, press A and apply the honey to the tree. Wait about 6 - 8 hours and when the tree is shaking it means theres a Pokemon there!
put honey on a tree