Offensive Core
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Latios (M) @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Draco Meteor
- Psyshock
- Defog
- Memento
Azumarill @ Sitrus Berry
Ability: Huge Power
EVs: 252 HP / 252 Atk / 4 Spe
Adamant Nature
- Aqua Jet
- Play Rough
- Knock Off
- Belly Drum
Magnezone @ Choice Scarf
Ability: Magnet Pull
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Hidden Power [Fire]
- Thunderbolt
- Volt Switch
- Flash Cannon
Since more and more Latios checks occur nowadays,a traditional coverage adjust for Latios can be little help for it to surpass checks and do markable damage on opposing team,that's why I choose the Memento set.
Memento,to some extent,can patch up the side effect of Draco Meteor,making it not a momentum loss any more but a momentum gain,at the expense of Latios' life.It shouldn't be used carelessly in early-game,be sure your sacrifice is worthy.
To make sure Latios not being walled easily,remove Steel-Type in opponent's team is necessary.Scarf Magnezone can somehow made it,including Mega Scizor,which is faster than non-Scarfed Magnezone.While it won't be that easy cause Mega Scizor often runs U-Turn and uses frequently,we have seldom chances to switch in/pivot in(since rarely a Scizor switch into a VoltTurn)Magnezone,but if you feel Mega Scizor really annoying,can Memento on it and have Magnezone in,KO.As known,Magnezone is a solid check Skarmory/Ferrothorn.
Belly Drum fits Memento well on teambuilding,while Azu,the best BDmon rn, also checks Weavile,one of Latios' check that can't switch into Draco Meteor.If Weavile exist,Draco Meteor+Switch into Azumarill might be a strategy,but fail when it runs Pursuit.
BD Azu fail to surpass Mega Venusaur,which is checked by Latios,don't run Memento + Belly Drum when opposing Mega Venusaur is not out yet.
When battling,it is important to remove Steel-Type first,it walls Latios and BD Azu both.LO Latios and BD Azu should be reserved carefully,not let too much switch in and get worn down.
Secondly,it time for latios.Beware of Pursuiting T-Tar,SpD Heatran that cannot be trapped by Magnezone,they counters Latios well.We may have to double switch to Azumarill to check these two.
Finally,sac Latios with Memento after a Draco Meteor killing,or whatever,have Azumarill in and make a big news.
The last two step is not solid,of course.We can just set up Belly Drum whenever got the momentum,for instance after the sack of Magnezone.
Another boosting Pokemon is appreciated in team since BD Azu don't match up all situations.
And you can change Azumarill's set,a Belly Drum set is not a necessary when there is another mon can take advantage from Latios' Memento,such as Zard-X,QD Volcarona,QD Venomoth and Double Dance/SDSalac Landorus-T.
T-Tar and SpD Heatran stops these core effectively since they can wall Latios while not removed by Magnezone.Since Latios is stopped,it's check to Mega Venusaur can be pointless.The other mons should make up this disadvantage.
Mega Metagross / Mega Medicham / LO Tornadus-T with Superpower / Dugtrio may execute this.Magma Storm Heatran can counter Mega Venusaur without EQ,while acting as a breaker.
Opposing Rotom-W is annoying,not only to this core but all the metagame.It has a quite good coverage,while Hydro Pump fits both Will-o-Wisp and Volt Switch quite well.With a perfect Typing only weak to Grass and Mold Breaker EQ.
I put it forward to mention that Offensive core are afraid of the loss of momentum,and suffers from status + stall strategies.