You should get the Global-Dex. (Global Poke-Dex)
You can find it in any room. It's just really rare. I know i have been looking for it for days and have only seen 1
1.by trading but the Pokemon must have been seen and registered on your pokedex 2. get it in fire red/leaf green and release it into the pal park
They blend in with the green leaf
A green onyx (if you are talking about pokemon) is a shiny and rare pokemon. tough I have never seen one
Only in Leaf Green, on One Island (I think Kindle Road)
You can battle trainers with a Smoochum(puts it in pokedex as "seen"), then get it from the GTS, or just get one from a friend. Also, you can get one from migration(Emerald, Ruby, Sapphire, Fire Red, Leaf Green)
I don't think you can get it in saphire. but i have ruby, but i still havn't seen it. but i traded for it from emreald. You can trade Ditto from Emerald, Fire Red or Leaf Green, but it's not on Ruby or Sapphire
Its impossible to actually catch one in diamond But you can transfer it from fir red or leaf green or you can go to the GTS in jubilife city if you have seen mewtwo in your pokedex
No you will automatically say no to all his offers as far as I've seen. If you want you can try losing to him but I don't think it will do anything.
When a photon hits a leaf, it may be absorbed by chlorophyll molecules, which are specialized pigments that can capture the energy of the photon and initiate photosynthesis. This absorbed energy is then used to drive chemical reactions that convert carbon dioxide and water into glucose and oxygen.
the real answer is you can't become a fire red or leaf green gym leader and if you can let me know because I've been playing Pokemon for like 5 years now and so far i havent seen anything about being a gym leader
talk to the professor and u get a national dex