D. Gallade should have Volt Absorb and Jolly. Its typing is bad for defense.
Havoc (Delta Gallade) (M) @ Life Orb
Ability: Volt Absorb
EVs: 252 Atk / 4 Def / 252 Spe
Jolly nature
Shiny: Yes
Swords Dance
Icicle Crash
Thunder Punch/Wild Charge
Ice Shard/Drain Punch
If you’re running Bulky D. Venu use this set:
Venus (Delta Venusaur) (F) @ Leftovers
Ability: Regenerator
EVs: 252 HP, 252 Def, 4 SpD
Impish nature
Shiny: Yes
brave for jirachi so i can use u-turn after wish but i changed that so now, he has higher speed because he died so much. I replaced dark pulse w/ earth power
Looking at you team as a whole, there’s major group weakness to Ground Moves, and Jirachi will be weaker when hit by a fire move if the sun is shining.
Ninetales@Heat Rock; Drought: Wildfire, Nasty Plot, Solar Beam, Fire Blast. If dealing with physical fighters, Wildfire with not just burn the target, but for grass Pokémon, Wildfire burns all Pokémon with a weakness to fire.
Delta Gallade is good, thoufh the sun is a little detrimental.
For Delta Venusaur, you should equip the Big Root, which increases stamina draining moves, with Leech Seed and Draining Kiss, replace Moonlight for Protect so you can regain health on a free turn.
Delta Blastoise benefits best with a team based around the New Moon weather condition, it wouldn’t do well in a sun-based team. Same with Jirachi, more cons than pros for this myth.
Heatran should hold an Air Balloon to be temporarily immune to ground moves.
With Delta Venusaur, if the weather conditions are changed, Moonlight would be a unique gamble, but outside of Moonlight better effectiveness in the sunny and darkness, D. Venusaur has no more benefits in the sun, only neutral ground.