I've been playing my gameboy for 13 years... well, for some reasons I was hooked with this game (You what it is). this game is insanely rocking in its coolest way . I don't care if not all of you knows. If you are having hard times in choosing which version has come out with the best... I can help you =D
                   There are different versions of them but only few have great graphics and creativity.

ORAS version
1. Legendaries (weather trio)
   a. Rayquaza either X or Y 
   b. Kyogre either its Primal
   c. Groudon

Capturing those three is strategic * maybe for Rayquaza * they are in Low level
   a. Lvl. 20
   b. Lvl. 40
   c. Lvl. 40
remember I HAD my hard Times with this blog the same thing as catching them.

2. Graphics
              ORAS has the best version of them since it was only released 2 years ago its 3D effect was eye-catching. Remember the HM move FLY in Ruby and Sapphire in 2003? in their newer version the avatar used to fly real were you can control him and soar in the sky. Another one is having the great collection of legendaries in different time and spaces.

List
- Mesprit
-Afelf
-Uxie
-Cobalion
-Terrakion
-Virizion
-Thundurus
-Tornadus
-Regigigas
-Latios
-Latias
 
and lots of them making the entire game more challenging but fun.

Im not going to post any strategy and techniques. just PM me for those.

thanks.