Cool core, but I'd like to offer some constructive criticism.Paired with a way to check Latios and Volcarona, I feel that a core of Greninja and offensive Landorus-T can be extremely threatening
Greninja (M) @ Life Orb
Ability: Protean
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Hydro Pump
- Ice Beam
- Hidden Power [Fire]
- Grass Knot
Protean Greninja threatens a 2HKO or OHKO on every member of the team and outspeeds everything besides the scarfer. Grass Knot is to lure the Gastrodon into thinking it's the Greninja check. Expert Belt can be used to a) bluff scarf thanks to the scarf gren wave b) not get worn down. It does, however, make the 2HKO on Celesteela and the OHKO on Latios a roll.
252 SpA Life Orb Protean Greninja Hidden Power Fire vs. 224 HP / 0 SpD Heracross-Mega: 211-250 (59.1 - 70%) -- guaranteed 2HKO
252 SpA Life Orb Protean Greninja Hidden Power Fire vs. 252 HP / 44 SpD Celesteela: 205-244 (51.5 - 61.3%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
252 SpA Life Orb Protean Greninja Grass Knot (60 BP) vs. 252 HP / 252+ SpD Gastrodon: 359-426 (84.2 - 100%) -- 37.5% chance to OHKO after Stealth Rock
252 SpA Life Orb Protean Greninja Ice Beam vs. 0 HP / 4 SpD Latios: 299-354 (100 - 118.3%) -- guaranteed OHKO
252 SpA Life Orb Greninja Hydro Pump vs. 0 HP / 4 SpD Volcarona: 382-452 (122.8 - 145.3%) -- guaranteed OHKO
Landorus-Therian (M) @ Flyinium Z
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Jolly / Adamant Nature
- Earthquake
- Fly
- Gravity
- Stealth Rock / Substitute
Apart from pivoting into Heracross and Garchomp, Landorus is very dangerous for the soul reason that it is difficult for this team to contain without very smart pivoting. I would typically run Jolly, but Adamant is okay against this team. Gravity is to beat Celesteela and SSSS nukes pretty much anything that isn't Celesteela. If well played, Landorus can grab a handful of teams versus this team. Substitute is a good option due to the fact that pivoting is made much harder for the opponent
252 Atk Landorus-Therian Supersonic Skystrike (175 BP) vs. 252 HP / 4 Def Gastrodon: 423-498 (99.2 - 116.9%) -- 93.8% chance to OHKO
252 Atk Landorus-Therian Earthquake vs. 252 HP / 4 Def Gastrodon: 241-285 (56.5 - 66.9%) -- guaranteed 2HKO after Leftovers recovery
252 Atk Landorus-Therian Earthquake vs. 252 HP / 216+ Def Celesteela: 258-306 (64.8 - 76.8%) -- guaranteed 2HKO after Leftovers recovery
Grass Knot is useful for taking Gastrodon out, but I find its usefulness in other situations somewhat questionable. For instance, it has difficulty dealing notable damage to Tapu Fini or Rotom-W. I wouldn't know if this core would be helpful in situations outside of Gastrodon. I mean, sure, it'll handle Gastrodon great, but I wouldn't know about handling other meta threats. People may want to run another move in its place – for instance Spikes, which is more generally useful.