Yah but I forget if you need them in your party you can get them in emerald ruby or sapphire.
The reggis are not available in leafgreen you will need Ruby, Sapphire and Emerald to give you them.
To catch Regis in Pokémon Ruby you need to defeat the Pokémon League in the sealed chamber. There will be a puzzle inside that will show you how to obtain Regis.
Yes.
No you do not need the regis to open sky pillar it is actually open before you even go to the Pokemon league and rayquaza starts on Lv. 70
No. You need to go to the Pokemon league before you can catch it.
no, not necessarily, you do however need the nationalDex which you get for seeing all 150 Pokemon in shinnoh
You cant (sorry) except for regiggigas - or something like that, but to get to him you need to have the others from ruby sapphire or emerald.
You go to the snowpoint temple but first you need to have the national pokedex and regirock regice and registell.
first you need an eleventh movie regigigas... ( obtained through an event) then take it with you wherever you go ... iron island close to exit(registeel), entrance to route 216 (regiice), route 228 (regirock)
no
no
There is a cavern west of Pacifidlog. It is in the maze of current, and you have to use dive. You also need to know how to read Braille.