Since this gen is almost over and soon this facility will be dead and buried (hopefully), let's have a thread dedicated to it!

I'm trying the super singles in ORAS right now, just started after getting eliminated in the 40s for letting Chansey die to an Alakazam like a retard
Here's my team:

Gyarados @ Gyaradosite
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Waterfall
- Crunch
- Earthquake
- Dragon Dance

Chesnaught @ Rocky Helmet
Ability: Bulletproof
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Drain Punch
- Stone Edge
- Leech Seed
- Spiky Shield

Chansey (F) @ Eviolite
Ability: Natural Cure
EVs: 252 Def / 4 SpA / 252 SpD
Bold Nature
IVs: 0 Atk
- Seismic Toss
- Flamethrower
- Soft-Boiled
- Toxic

Any tips or recommendations? I want to try the super doubles next, but I'm not very experienced in the format.

Post your teams and streaks!