So far you can't trade from ruby to sapphire or vise versa but if you could then i would say that it would be like the rest and you could trde them all.
Groudon cannot be found in Sapphire. Hence, it has to be traded from Ruby.
No. It needs to be traded from ruby/sapphire/emerald
you have to have them traded from ruby Sapphire or emerald
You can't, it must be traded from ruby, sapphire, or emerald.
No, you cannot catch Sableyes on Pokemon Ruby and they have to be traded in from a copy of Sapphire, Emerald, or XD Gale of Darkness.
From what i heard you cannot get KYOGRE in ruby.
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.
It is not possible for a person to get Exploud from Pokemon Indigo. This Pokemon must be traded from Ruby, Sapphire, or Emerald.
Shroomish is not available to be caught in the wild in Pokemon FireRed, it must be traded from Ruby or Sapphire.
Meditite can not be obtained in Pokemon Emerald. It can be traded from Ruby/Sapphire/colosseum/or XD.
Shellgon must be traded from Pokemon Ruby, Sapphire, or Emerald. None of the Pokemon introduced in these games are in FireRed.
All Pokemon from Kanto, Johto, and Hoenn can be obtained in Sapphire. Seedot, Nuzleaf, Shiftry, Mawile, Zangoose, Solrock, and Groudon must be traded from Ruby. Other Pokemon like the starters must also be traded over.