How to get event Unova starters in ORAS

For those of you struggling to find good sets, I have some premade for these Pokémon.

[3D='serperior']
Serperior @ Light Clay
Ability: Contrary
EVs: 248 HP / 8 SpA / 252 Spe
Timid Nature
- Leaf Storm
- Light Screen
- Reflect
- Dragon Pulse/Giga Drain/Toxic
Serpeior isn't all great. It's fast and it has even Defenses. I took advantage of those things by giving it Light Screen and Reflect, which not only makes Serperior last much longer, it gives the rest of your team a nice boost as well. Leaf Storm is your obvious attack choice, getting your Sp. Attack raises with every hit. Your last move could be one of 3 choices. Dragon Pulse is good for coverage, Giga Drain is good for recovery and Toxic is good for slowly dealing damage to foes who resist Leaf Storm, but after a few of those, you can 2HKO Pokémon that have double resistance like M-Salamence

[3D='emboar']
Emboar @ Leftovers/Rocky Helmet
Ability: Reckless
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Flare Blitz
- Hammer Arm
- Head Smash/Wild Charge
- Curse
Reckless gives all of Emboar's recoil moves more power, so give it Flare Blitz for huge damage. Curse raises Attack and Defense while lowering Speed, so give it Hammer Arm to do lots of damage without worrying about going slow. Your other recoil move could be a choice between Head Smash and Wild Charge. Both have similar type coverage, but Head Smash does a massive 50% recoil. If you're OHKO-ing Blisseys an Chanseys with this move, chances are that Emboar won't last long. Wild Charge also takes care of pesky Water-types. Finally, give it Leftovers or Rocky Helmet. Leftovers will help Emboar last longer, and Rocky Helmet will damage foes that are trying to go in for a quick KO.

[3D='samurott']
Samurott @ Leftovers
Ability: Shell Armor
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Swords Dance
- Aqua Jet
- Megahorn
- Waterfall/Dragon Tail
Since Samurott no longer takes critical hits, he becomes a great bulky attacker. Give him Leftovers and set up Swords Dance, and you're setup for a nice sweep. Aqua Jet lets you get pass most opponents that are faster than you, while Megahorn takes out pesky Grass-types. Your last choicecan be either Waterfall or Dragon Tail. Waterfall helps with slower but bulkier opponents while Dragon Tail helps cycle through your opponent's team.

I hope these were of some help!