Shadow Metagross

Shadow Metagross is a monster of a Pokemon. This thing sports high stats, the Shadow boost, and a powerful Charged Move to turn it into a Steel Type juggernaut. It's also an okay Psychic Type attacker for added value, though it's probably not worth unlocking a second Charged Move for that role unless you lack alternatives. The one down-side to Shadow Metagross is the fact that Steel isn't an overly common weakness for Raid bosses, though you can bet that Shadow Metagross will top the charts when relevant.

Best PvE Offensive Moveset

• Bullet Punch and Meteor Mash are the go-to moves for Shadow Metagross, allowing it to take its place as the apex Steel Type. 
• Zen Headbutt and Psychic are useful if you need Psychic damage.
• Flash Cannon and Earthquake are sub-par choices on offense. 

Best PvE Defensive Moveset

• Zen Headbutt is the fast move of choice. It hits common Fighting types for Super Effective damage and is a stronger option on defense.
• Bullet Punch isn't bad, but having the same typing as the top Charged Move option makes it a bit less desirable.
• Meteor Mash hits hard and has decent neutral coverage, though Psychic is the move of choice if you're placing it between Fighting-weak defenders.
• Earthquake is a powerful option with some counter-coverage, but it's also riskier on defense due to its higher energy cost.
• Flash Cannon should plainly be avoided.

Bullet Punch has solid damage and above average energy gain. Avoid Zen Headbutt at all costs.

Meteor Mash is an incredibly powerful, if somewhat expensive move, and is core on any Metagross set. Sadly, if you’re missing Meteor Mash, maybe leave this metal menace out of your matches. Because Flash Cannon isn't very good, we round out this set with Earthquake which gives Metagross the tools to deal with fellow Steel-types and any potential Fire-type counters.