you have to beat mt freeze.
You will find him in Magma Cavern and Southern Cavern.
Magma Cavern Pit is 23 floors Then there is a Magma Cavern Pit Magma Cavern Pit has 3 floors and the 3rd floor is Groudon
If you mean Groundon, then Groundon is in Magma Cavern, after passing 25 levels of magma cavern, and then 3 floors on magma cavern pit.
You can get sandshrew or sandslash in magma cavern 1-6
Well you do a few jobs until you go into magma cavern
Magma Cavern has 23 floors Magma Cavern Pit has 3 floors Groudon is found on the 3rd floor of the Magma Cavern pit glad to help...VERONICA
keep doing rescue missions and then eventually u get to go into magma cavern.
Groudon is located in Magma Cavern. He has a -10 chance of recruiting.
23 and then the mid point. After
Once you talk to ninetales, Alakazam's team goes to magma cavern. All you have to do is wait and keep doing rescue missions and checking town square and you will be asked to go.
23 FLOORS == MAGMA CAVERN PIT = 3 FLOORS WITH GROUDON AT THE END...VERONICA
Onix are common in Magma Cavern 20F (where you meet Groudon).