Can This Battle Spot Singles team work out

Question

Disgusting (Metagross-Mega) @ Metagrossite
Ability: Clear Body
Level: 50
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bullet Punch
- Meteor Mash
- Thunder Punch
- Earthquake

Garswamp (Garchomp) (M) @ Rocky Helmet
Ability: Rough Skin
Level: 50
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Iron Head
- Earthquake
- Rock Slide

DAnk_MeMer (Greninja) (M) @ Choice Scarf
Ability: Protean
Level: 50
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Dark Pulse
- Ice Beam
- Hidden Power [Electric]
- Surf

Dr4gon (Charizard-Mega-X) (M) @ Charizardite X
Ability: Solar Power
Level: 50
Shiny: Yes
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Flame Charge
- Outrage
- Earthquake
- Roost

Pheromosa @ Focus Sash
Ability: Beast Boost
Level: 50
Shiny: Yes
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Bug Buzz
- High Jump Kick
- Ice Beam
- Poison Jab

Ain't No Snitch (Gliscor) (M) @ Toxic Orb
Ability: Poison Heal
Level: 50
Shiny: Yes
EVs: 252 HP / 184 Def / 72 Spe
Impish Nature
- Taunt
- Earthquake
- Stealth Rock
- Roost

Comments

Replace Pheromosa with Breloom for spore. Replace Metagross's meteor mash with ice punch to cover common Pokemon like Salamence, Landorus, and Hippowdon. Give Garchomp a focus sash to guarantee that it survives one hit. Replace its iron head and rock slide with outrage for STAB and fire fang to cover grass, bug, ice, and some steel Pokemon that aren't weak to ground. Replace Charizard's earthquake and roost with flare blitz for more power and swords dance to raise physical attack. Give Gliscor 212 HP/44 Def/252 SpD careful for maximum bulk and maximum healing from poison heal. Replace its taunt and stealth rock with protect to heal and guillotine to one-shot opponents.

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Reasonable Idea But Why do you need guillotine it's usually gonna miss

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Guillotine gives Gliscor a way to beat things 1v1 that it usually would not. The fact it is there actively threatens and pressures the opponent. It’s not supposed to be reliable, it’s only used is specific scenarios.

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Gliscor can completely wall some Pokemon, so it can use guillotine repeatedly without worrying about getting hurt. Guillotine's accuracy is 33% when used once, but if you use it 8 times, then its chance to hit becomes greater than 99%.
Also, it's pronounced GIL-o-tine, with a short i sound, short o sound, and long i sound. Don't listen to anyone who tells you otherwise.

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What game is this for?

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Generally, we assume these teams are made for the newest core series game (USM in this case) unless specified otherwise.

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I think you can take out a mega in your team because you have 2 mega in your team, and don't put stealth rock and put toxic on glicsor.