rayquaza
i would say........lugia,ho-oh,groudon,rayquaza,kyogre.
The strongest Pokemon is probably one of these three. Rayquaza Groudon or Kyoger. These three are the main legendaries of this game.
Groudon, kyogre, rayquaza, mewtwo, lugia, ho-oh.
groudon,kyogre and rayquaza groudon,kyogre and rayquaza
Groudon, Kyogre, and Rayquaza. Groudon is the fire legendary pokemon, Kyogre is the water legendary pokemon, and Rayquaza is the air legendary pokemon.
You can't get Kyogre in Pokemon Ruby but you can get Kyogre in Pokemon emerald and sapphire and in ruby you only get groudon and rayquaza. In sapphire you get Kyogre and rayquaza and in emerald you can get groudon, Kyogre, and Rayquaza.
Groudon and Rayquaza are located in the Hidden Tower off of Route 47.
the middlest strongest pokemon is............ Rayquaza!!
Kyogre, Groudon, Rayquaza
groudon and rayquaza
groudon,kyogre,rayquaza
Groudon Latios latias and rayquaza