The following are not valid sets, mostly due to typos.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Blaziken (Physical Mega)': {"level":50,"evs":{"atk":252,"spd":4,"spe":252},"nature":"Adamant","ability":"Speed Boost","item":"Blazekinite","moves":["Flare Blitz","High Jump Kick","Stone Edge","Thunder Punch"]} = "Blazekinite" is an invalid item.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Gyarados (Z Bounce)': {"level":50,"evs":{"atk":252,"def":4,"spe":252},"nature":"Jolly","ability":"Intimidate","item":"Flynium Z","moves":["Bounce","Waterfall","Earthquake","Ice Fang"]} = "Flynium Z" is an invalid item.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Heatran (Fast Stall)': {"level":50,"evs":{"hp":212,"spd":44,"spe":252},"nature":"Timid","ability":"Flash Fire","item":"Leftovers","moves":["Magmar Storm","Toxic","Substitute","Earth Power"]} = "Magmar Storm" is an invalid move.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Heatran (Bulky Stall)': {"level":50,"evs":{"hp":212,"def":4,"spa":44,"spd":156,"spe":92},"nature":"Calm","ability":"Flash Fire","item":"Leftovers","moves":["Magmar Storm","Toxic","Substitute","Earth Power"]} = "Magmar Storm" is an invalid move.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Heatran (Community Create-a-Team)': {"level":50,"evs":{"hp":212,"def":44,"spd":252},"nature":"Careful","ability":"Flash Fire","item":"Leftovers","moves":["Magmar Storm","Earth Power","Toxic","Protect"]} = "Magmar Storm" is an invalid move.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Infernape (Special Attacker)': {"level":50,"evs":{"spa":252,"spd":4,"spe":252},"nature":"Timid","ability":"Blaze","item":"Focus Sash","moves":["Overheat","Hidden Power Ice","Focus Blast","Vacuum Wave"],"hpType":"Ice"} = Infernape's move Vacuum Wave is not available in generation 6 or later.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Landorus-Therian (cant say's QR Team)': {"level":50,"evs":{"hp":244,"def":236,"spe":38},"nature":"Careful","ability":"Intimidate","item":"Mago Berry","moves":["Earthquake","Rock Tomb","Stealth Rock","U-turn"]} = Landorus has more than 510 total EVs.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Scizor (Physically Defensive)': {"level":50,"evs":{"hp":252,"atk":4,"def":252},"nature":"Impish","ability":"Technician","item":"Rock Helmet","moves":["Bullet Punch","U-turn","Roost","Toxic"]} = "Rock Helmet" is an invalid item.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Sharpedo (Mega Shark)': {"level":50,"evs":{"hp":4,"atk":252,"spe":252},"nature":"Adamant","ability":"Speed Bosst","item":"Sharpedonite","moves":["Waterfall","Crunch","Ice Fang","Poison Fang"]} = "Speed Bosst" is an invalid ability.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Sharpedo (Sashed Special Attacker)': {"level":50,"evs":{"hp":4,"spa":252,"spe":252},"nature":"Modest","ability":"Speed Bosst","item":"Focus Sash","moves":["Dark Pulse","Ice Beam","Hydro Pump","Destiny Bond"]} = "Speed Bosst" is an invalid ability.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Silvally-Ground (SD + Flame Charge)': {"level":50,"evs":{"atk":252,"spd":4,"spe":252},"nature":"Adamant","ability":"RKS System","item":"Ground Memory","moves":["Multi Attack","Swords Dance","Flame Charge","Stone Edge"]} = Silvally-Ground can't learn Stone Edge.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Tapu Bulu (Community Create-a-Team)': {"level":50,"evs":{"hp":236,"atk":164,"spd":108},"nature":"Adamant","ability":"Grassy Surge","item":"Assault Vest","moves":["Wood Hammer","Horn Leech","Supoerpower","Rock Tomb"]} = "Supoerpower" is an invalid move.
cantsay.github.io Invalid set [Gen 7] Battle Spot Singles: Umbreon (Defensive Standard)': {"level":50,"evs":{"hp":252,"def":252,"spd":4},"nature":"Bold","ability":"Synchronise","item":"Leftovers","moves":["Foul Play","Wish","Protect","Yawn"]} = "Synchronise" is an invalid ability.
cantsay.github.io Invalid set [Gen 6] Battle Spot Singles: Heatran (Fast Stall)': {"level":50,"evs":{"hp":212,"spd":44,"spe":252},"nature":"Timid","ability":"Flash Fire","item":"Leftovers","moves":["Magmar Storm","Toxic","Substitute","Earth Power"]} = "Magmar Storm" is an invalid move.
cantsay.github.io Invalid set [Gen 6] Battle Spot Singles: Heatran (Bulky Stall)': {"level":50,"evs":{"hp":212,"def":4,"spa":44,"spd":156,"spe":92},"nature":"Calm","ability":"Flash Fire","item":"Leftovers","moves":["Magmar Storm","Toxic","Substitute","Earth Power"]} = "Magmar Storm" is an invalid move.
cantsay.github.io Invalid set [Gen 6] Battle Spot Singles: Scizor (Physically Defensive)': {"level":50,"evs":{"hp":252,"atk":4,"def":252},"nature":"Impish","ability":"Technician","item":"Rock Helmet","moves":["Bullet Punch","U-turn","Roost","Toxic"]} = "Rock Helmet" is an invalid item.
cantsay.github.io Invalid set [Gen 6] Battle Spot Singles: Sharpedo (Sashed Special Attacker)': {"level":50,"evs":{"hp":4,"spa":252,"spe":252},"nature":"Modest","ability":"Speed Bosst","item":"Focus Sash","moves":["Dark Pulse","Ice Beam","Hydro Pump","Destiny Bond"]} = "Speed Bosst" is an invalid ability.