I am gonna breed and ev train top class pokes from my X and send them over to ORAS any suggestions on what my team should be?
I can't make a team for you but I can say the best in game Pokemon to use: ( Assuming you want to use Pokemon you can find pre national pokedex ( going off the pokedex of Pokemon Emerald ) )
Normal: Exploud can be good with Boomburst but Zangoose can also be a great Pokemon.
Fighting: Blaziken is good but it is sort of OP and it kind of sucks in the ocean parts of the game. Since availability doesn't matter when you are gonna breed them Heracross would be a great pick and he can even mega evolve. Furthermore Breloom, Machamp and Medicham are also solid Fighting types.
Flying: Skarmory, Swellow and Crobat seem like the best Flying types, Crobat may be annoying to evolve though. You can use Salamence but Flying types are mainly used because of Fly and Salamence doesn't learn it until level 50. Gyarados is good but can't Fly either or has any Flying type moves.
Poison: Crobat and Tentacruel are the best ones to use but they don't really focus on their Poison typing. However if Roserade is obtainable then it would be a great pick.
Ground: Rhyperior, Swampert and Camerupt seem like good options. If you have the patience consider getting a Flygon.
Rock: Rhyperior is really the best option but the fossil Pokemon are also usable. Agrron is also good but again takes a while to evolve.
Bug: While Pinsir and Heracross are normally difficult to get in Hoenn that doesn't matter when you breed for them. Outside of those only Armaldo is worth mentioning.
Ghost: Ehhhhh maybe Dusknoir if we can get it in the new remakes. Banette can also be cool with it's mega evolution.
Steel: Metagross, Skarmory and if you can get the mega stone Mawile seem like good steel types. Aggron is again good but evolving it takes a while and so does evolving Metagross.
Fire: Blaziken is probably the best no doubt. Only other decent ones Camerupt and Drought Ninetales.
Water: There are alot of options including Swampert, Ludicolo, Gyarados, Azumarill, Starmie, Milotic and Kingdra. Walrein, Golduck, Lanturn, Milotic, Crawdaunt, Whishcash, Sharpedo and Tentacruel are also good.
Grass: Sceptile, Ludicolo and Breloom stand out as the best Grass types. However if we can get Roserade that would be great. Shiftry, Cacturne and Vileplume also sound cool.
Electric: Manectric and if we can get it Magnezone are probably the best Electric types. but like with other types Lanturn, and Raichu are also decent Pokemon.
Psychic: Alakazam no doubt since in game Magic Guard is based lord. Starmie, Metagross and Medicham are honorable mentions.
Ice: Walrein and Glalie. Even though Glalie is cool he sucks so Walrein.
Dragon: Kingdra, Salamence and Flygon evolve late but they are great Pokemon late in the game.
Dark: Shiftry, Sharpedo, Crawdaunt and Absol are the only ones I can think of. Maybe Cacturne though.
Fairy: Azumarill, Gardevoir and Mawile if we can get the mega stone. Azumarill probably seems like the best one.
These are all my opinion by the way but I think they will be the most useful in game. By the way speaking of in game has anyone thought about their in game team yet. Mine is probably going to look like this:
Alakazam ( My favorite Pokemon, easy to get and just incredibly good. Can even mega evolve. )
Breloom ( Another one of my favorites and haven't used it in game since generation 3. Would be cool to use with now actual Grass STAB attacks. )
Skarmory ( Another one of my favorite Pokemon if you are starting to see the trend. All around great wall and learns Fly which is cool in game. Might be a bit on the weak side though and may be tough to get. )
Crawdaunt ( Never used a Crawdaunt and would be fun to use when he doesn't suck in his own region for once. Good Water and Dark type STAB moves sound great and it's speed isn't terrible for in game. )
Still deciding on the last 2 slots but I am thinking about maybe an Electric type like Magnezone and a Fire type but the Fire types aren't great in Hoenn and the only decent one is Blaziken which I am not a fan off. Maybe I can trade over something like a Chimchar but I don't know.