Giratina (Altered)

GhostDragon
Weak toIceGhostDragonDarkFairy
ResistsNormalFireWaterElectricGrassFightingPoisonBug

Top Counters

Deoxys (Attack)
Poison Jab|Dark Pulse
Rayquaza (Mega)
Dragon Tail|Outrage, Breaking Swipe
Alakazam (Mega)
Confusion|Shadow Ball, Dazzling Gleam
Groudon (Primal)
Dragon Tail|Earthquake
Kyogre (Primal)
Waterfall|Blizzard, Avalanche

Budget Picks

Haxorus
Dragon Tail|Dragon Claw, Night Slash
Salamence
Dragon Tail|Draco Meteor, Outrage
Alakazam
Confusion|Shadow Ball, Dazzling Gleam
Chandelure
Hex|Poltergeist, Shadow Ball
Dragonite
Dragon Tail|Draco Meteor, Outrage