It should be Heatran but there's also Giratina. I think they both live in different areas in differet caves. One of them is in the resort area. hop this helpd
At the Resort Area.
you get togipie between battle area and resort area
By saying Wowie in the micLaur
i think he is near resort area
229 near the resort area
talk and talk that person...
you can do both just has to be between the fight area and resort area
It is a level 100 magikarp.
you can trade with your friend in Jnhto region or get it in resort area
You can find Gloom in the patch of grass by the resort area.
I think you can get it when you have completed the completed the contests in resort area
You cant. You can only get it on Diamond or pearl. In the desert area north of the resort area