I got one in the resort area I will trade it for any grass-type starter fc is 3395 1609 3739
Yes, you can get them from tree's
you cant evolve a wild Pokemon in Pokemon platinum you either have to catch the wild Pokemon and then evolve him/her or kill the wild Pokemon.
They are not found in the wild in Pokemon Platinum.
you cant only by trading it from emerald
No, Bibarel's are one of the worst wild pokemon there are in pokemon platinum pearl or diamond
as far as i know its not possible to obtain a "wild" groudon on Pokemon platinum. however you can trade it in from other games such as Pokemon soul silver.
no
you can find a wild kirlia in the Pokemon mansion area but not in the Pokemon mansion
In the woods.
you can't find a gardevior in the wild
you can battle them on routes 224 and 230 in platinum
P.S. it will freeze up after caught.