gengar
I had the same problem XD - when you enter the Victory Road, go straight until the sharp right turn, go down with rock climb, and go left under the Rope bridge thingy, their will be a trainer with both Gengar (gastly's last form) and Gardevoir, Ralt's original last form.
To catch a shiny Gastly, there are three things you can try. First off, you can try catching a shiny Gastly in the wild. However, there is a 1 in 8192 chance of encountering a shiny Gastly and may take you hours to find one. Second, you can try breeding a shiny Gastly. There is a greater chance to find a shiny Gastly by breeding, but it still takes a few hours depending on how well you breed. Last, you can use your PokeRadar to chain Gastly. Depending on your luck and how well you chain, you can find a shiny Gastly within minutes or more. If your chain of Gastly reach up to 40 or more, your chance of finding a shiny patch is 1 in 200. A shiny patch will contain a shiny Gastly. You may even find several shiny Gastly from chaining. If you're really lucky, you can get a shiny Gastly from your first or second or even tenth chain.
You have to beat red
in ice path
You need to do the last gym in kanto.
In the first city
blue in viridian city
one berry
i think it does the one who also does for bakura in yugioh last season of first series of course
Lv 61, Feint.
It's not the "last" Legendary Pokemon that you can find in Pokemon HeartGold, but most people usually catch that one last given that you need to have both Kyogre and Groudon in your party for Professor Oak to give you the Jade Orb to get to Rayquaza.
you cant theres only 16. last leader is Blue