My usual team I run White 2 with, but idealized with proper natures/EVs/IVs, and in order of capture
Romulus (Lucario) (M) @ Expert Belt
Ability: Steadfast
EVs: 252 Atk / 252 SpA / 4 Spe
Naughty Nature
- Aura Sphere
- Ice Punch
- Rock Slide
- Psychic
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With a Lucario I would honestly focus in one of its offensive stats, not both. You're going to need the speed that's otherwise going into the other attack stat.
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Brunhilda (Krookodile) (F) @ Leftovers
Ability: Intimidate
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Earthquake
- Crunch
- Rock Slide
- Hone Claws
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Pretty solid, though Leftovers is an interesting choice. (I can't talk, I ran Rocky Helmet on a Haxorus.)
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Amaryllis (Lilligant) (F) @ Life Orb
Ability: Own Tempo
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Petal Dance
- Giga Drain
- Sleep Powder
- Quiver Dance
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Sleep Powder feels too unreliable, especially when you're running Life Orb. I would probably swap in Big Root and/or Leech Seed instead.
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Nash (Braviary) (M) @ Muscle Band
Ability: Defiant
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Brave Bird
- Return
- Bulk Up
- Roost
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Solid.
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Supernova (Volcarona) (F) @ Wise Glasses
Ability: Flame Body
EVs: 252 SpA / 4 SpD / 252 Spe
Mild Nature
- Flamethrower
- Bug Buzz
- Giga Drain
- Quiver Dance
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Solid, but I would put the Life Orb on this one.
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Asteron (Starmie) @ Wide Lens
Ability: Natural Cure
EVs: 4 Def / 252 SpA / 252 Spe
Bold Nature
- Hydro Pump
- Blizzard
- Thunder
- Recover
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Frankly while this definitely looks fun I would use Scald, Ice Beam, and Thunderbolt and then give an Expert Belt or Leftovers or something.