There is no Groudon in Pokémon Crystal.
Actually you will not be able to find a Groudon in pokemon black or white. It's because you will not be able to find a Groudon in the wild. The only way you can get Groudon in pokemon black and white you will have to trade with someone who has a Groudon or you can use Global trade.
Groudon is unavailable in heartgold. You can only catch Kyogre. If you want groudon, you will have to trade from heartgold, or migrate from another game.
Wailord is the largest Pokemon followed by groudon.
Groudon is one of the three legendary Pokemon. He represents the land.
Groudon and Rayquaza are located in the Hidden Tower off of Route 47.
Groudon is located in Magma Cavern. He has a -10 chance of recruiting.
in the far back of the hide out where groudon is located once you walk over to groudon he'll come he'll battle you, and groudon will awaken then run away. -I hope this helped =]
Groudon... He is located in sootopolis cave.
You catch Groudon in Terra Cave which is located in one of routes 114, 115, 116, and 118, and Kyogre in Marine Cave which is located in one of routes 105, 125, 127, or 129. For both of these, the location is different in each game.
Groudon is AWESOME!
There is no ruby in groudon.
groudon is better
groudon
Groudon is from the hoen region.
Groudon's cave is in sootoopolis.
At ruby version Groudon is level 45, at emerald Groudon is level 70.