Dialga's Moveset

[Lapras1016]

So there's this Dialga that's yet to be caught... I don't know what to give it! I'd appreciate advice...

REST-TALK DIALGA
Dialga @Adamant Orb
Ability: Pressure
Nature: Bold (-Atk, +Def)
Rest
Sleep Talk
Dragon Pulse
Aura Sphere
EV's: 252 HP, 4 D, 252 SA

or...

SWEEPER DIALGA
Dialga @Adamant Orb
Ability: Pressure
Nature: Modest (-Atk, +Sp. Atk) or Timid (-Atk, +Spd)
Dragon Pulse
Flash Cannon/Thunder
Aura Sphere
Double Team
EV's: 4 HP, 252 SA, 252 S

or...

TRICK ROOM DIALGA
Dialga @Adamant Orb
Ability: Pressure
Nature: Quiet (-Spd, +Sp. Atk)
Trick Room
Dragon Pulse
Aura Sphere
Flash Cannon/Thunder
EV's: 252 HP, 4 D, 252 SA

Thank you.