Is a good casual team?

D.Blastoise@Delta Blastosite Nature: Naughty Attack: 185
-Aura Sphere Defense:189 -Focus Blast Sp.Attack: 188 -Knock Off Speed: 177 -Dark Pulse Jolteon@Electric Gem Nature: Modest Sp.Attack: 235 -Thunderbolt@ Sp.Defense: 160 -Discharge@ Speed: 247 -Thunder Charizard@Leftovers Nature: Modest Attack: 139 -Air Slash@ Defense: 152
-Heat Wave@ Sp.Attack : 223
-Flame Burst@ Sp.Def: 141
-FlameThrower@ Speed: 192
Garchomp@Leftovers Nature: Adamant Attack: 266 -Dig@ Defense: 165 -Dragon Claw@ Sp.Defense: 145 -Dragon Rush@ Speed: 181 -DracoJet Empoleon@Mystic Waters Nature: Modest Sp.Attack: 247 -Hydro Pump@ Speed: 107 -BubleBeam -Scald -Surf Metagross@Wide Lens Nature: Jolly Attack: 257 -Zen Headbutt@ Defense: 235 -Meteor Mash@ Speed: 155 -Bullet Punch -Metal Claw

First things first…

  • Adding stats won’t help with anything (as you didn’t even noted levels and they are effected by EVs and IVs).
  • D.Blastoise is a Special Attacker, so Knock Off isn’t the most usefull move on it. Besides that have Focus Blast in addition to Aura Sphere isn’t great. You should probably rethink the moveset.
  • Jolteon has 3 moves? And all 3 are Electric Type Moves, which Discharge < Thunderbolt and Thunder < Thunderbolt, so replace Discharge and Thunder. Electric Gem as a hold item only be usefull in competitive.
  • Charizard, another Pokemon which has 3 same type moves. Replace Flame Burst and Heat Wave or Flamethrower, as you prefer.
  • Garchomp. Dig should be Earthquake. Again… 3 Dragon Moves. Consider Rock Slide, Stone Edge, Fire Blast, etc.
  • Empoleon… No. 4 Water moves. No Steel-stab. Keep Scald and remove others.
  • Metagross shouldn’t have Metal Claw.

In a nutshell… Do not only run Stab-moves on your Pokemon. And maybe some utility might be usefull. You are only running attacking moves.

On one hand you’re asking for tips, and on the other you’re saying it’s casual. Also, do you mind posting the EVs instead of the stats? D Blastoise shouldn’t run Knock off (like mara said) Don’t use electric gem in game, that sucks cause it’s one time use. I’d put some coverage (shadow ball, signal beam, etc) and volt switch and get rid of Discharge and Thunder. If you want to boost electric moves, use a magnet as a held item (or life orb). Again, charizard should have some more coverage (different typed moves). Garchomp, listen to what mara said. Empoleon should only keep scald and put flash cannon for sure. Some other options are grass knot, stealth rock, and ice beam. Metagross should not have metal claw. I would suggest one of the elemental punches: either thunder punch or ice punch.