Yes they are, but you don't get the chance to fight against them. They serve no purpose except to help you defeat Team Aqua (and by helping, it means keeping most of the Aqua grunts preoccupied while you go fight another half dozen of them and their leader).
No, you cannot be a member of Team Aqua / Team Magma in Sapphire.
Team Magma is absent in Pokemon sapphire, but exists in ruby. Same with team aqua in ruby version, both teams only coexist in Pokemon emerald version
Google Pokemon sapphire walkthrough and search through a walkthrough
your get from team aqua or team magma i think
The Magma Base doesn't exist in Sapphire Version, but the team Aqua's Base is located outside of Lilycove City.
Pokemon Lottery in Lilycove Dept. store, team magma/team aqua hideout.
Yes.
team aqua and team magma, u have to beat them both as opposed to ruby and Sapphire where u only have to beat the team that is the same color of your game(ruby=magma)(Sapphire=aqua)
near where is team aqua/magma hideout. (in lilicone)
go to magma hide out
you dont team magma is on your side(they are not the bad guys team aqua is)
You can get one in team aqua hideout (if you are in Pokemon emerald/sapphire) Or in team Magma hideout (if you are playing Pokemon ruby) It is near the two fake electrodes