Well I would get a....
Shiftry lev 100
Swampert lev 100
Salamence lev 100
If you want the abilities of poke moves go to www.Psypoke.com
Salamence, Swampert, Metagross/Skarmory, Cradily/Sceptile, Flygon, Electrode
I'd get rid of the Regirock, because you have a Groudon already, and get a Manectric.
i would use a arcanine because they seedy and powerful
there isn't a "best" Pokemon team but mine is: Blaziken lv76, charizard lv72, alakazam lv70, electivire lv73, sceptile lv72 and my last Pokemon is a swampert lv74 =[)
Pokemon Ruby has you battle off against Team Magma and Groudon. In Sapphire, you battle off against Team Aqua and Kyogre. There's not really much a difference between the two. Also, the Lati's (Latias and Latios) also depend on the game. For Ruby, it's Latios. For Sapphire, it's Latias.
swampert or blaziken are the best type to beat gyms or Pokemon league
Groudoun swampert at a high level
The 6 Pokemon I would recommend would be Blaziken, Swampert, Sceptile, Gardivore, Aggron and Salmence so that you have an equally balanced team.
swampert(knows ice beam), gardevoir (knows shadow ball), tropius (learn HM01,02,05,06), sharpedo(learns HM03,04,07,08)
swampert altaria breloom camarupt raquiza flygon this is my team and I've beat the game no that's rubbish try swampert/absol/breloom/camerupt/salamence/armaldo
metagross salamence flygon blaziken swampert sceptile
get a lagendary like rayquaza
Pokemon Ruby Destiny is a hacked version of Pokemon Ruby for GBA that is kind of like Pokemon Red Rescue Team.
Go in with lv.70+ Pokemon and be ready for anything Its good to have a well balanced team. Mine was a Flygon, a Cacturne, Groudon, Swampert, Manetric, and a Mightyena. (i caught the Regis after.)If your Pokemon are all above lv 55, you will be unbeatable.
skarmory absol manectric torkoal breloom swampert
Yeah but Entei Raikou Regice Regirock Registeel and Mewtwo is better if you have them if not try Torkoal Shiftry Gardivoir Golem Swellow and Aggron
Pokemon Emerald, Ruby, and Saphire.