Groudon is a legendary, and therefore does not evolve.
70
No, Groudon does not evolve in Pokémon Ruby.
Groudon does not evolve, therefore no stone will make Groudon evolve.
lvl 65
Sweetheat, Groudon does not evolve o: --Taylor
...sigh. groudon is a legendary, it does NOT evolve
tentacool evolve lvl.30 togepi evolve lvl.30 kirlia evolve lvl.30 dratini evolve lvl.30
Groudon doesn't evolve... Sorry
lvl 30 no it does not evolve at lvl 30 i have a lickitonge at lvl 30 it did not evolve
No, whatever myth you heard of Groudon evolving is false. Groudon does not evolve at any time.
it will evolve at lvl 25
I'd get rid of the Regirock, because you have a Groudon already, and get a Manectric.
groudon doesnt evolve!