You can't
You can not get groudon in Pokemon pearlYou can get it through migrating from ruby, sapphire, or emerald.
What?!?!?!?!? Who are you talking to? Are you trying to stalk someone? Also, not everybody has a shiny Pokemon, I do, but not a Rayquaza or Groudon.
the only way to get groudon is to either import it from Pokemon sapphire/ ruby/ or emerald, OR, trade it from pearl/diamond/or platinum.
It might be shiny but you'll never get it... cause to get any shiny Pokemon it is 1/8192 chance of getting it shiny... so not possible!!!!
groudon is in pal park in the mountain area
Groudon isn't in Pokemon Pearl. The only way to get Groudon is to trade it from the GBA game, via Pal Park, or to cheat.
To get a shiny Pokemon try using the poke radar
I think a egg with a shiny Pokemon in it is a different color
You can find shiny Pokemon randomly through out the game.
There is no real way to get groudon, but you can just migrate it, or have a friend trade it to you.
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You have to use cheat code.