they appear from a line of 1/8000 if you do encounter one, congrats your very lucky!
Route 229 in the morning.I's often appear but it will not appear at evening,afternoon,and night.
Once a a day in Pokemon Platinum
like twice
misdreavious can't be found in platinum sadly
wild pokemon? my guess is that it's random
It makes wild Pokemon appear more often :( or :)
below 50%
Yes. You can use it as often as you like.
Skitty does not appear in Rusturf Tunnel. Only Whismur are there.
I believe it is just what Pokemon appear in what location, how often they appear, and what legendary you meet. And White Forest vs Black city (go to serebii.net to find out what those are.)
You are not able to buy the TM for the move Thief in Pokemon Platinum. You can find the TM for Thief in Eterna City. The move Thief isn't use often competitively and it doesn't matter which Pokemon can use it for it to steal held items.
Digletts are the only Pokemon in Diglett's cave but they appear so often that when you take your first step into the cave that there is a 7 out of nine chance a Diglett will appear