Keeping this in view, how good is Aggron?
Aggron in Pokémon GO is a steel rock type and he is the final evolution of the Pokémon GO Aron family. Aggron is a better version of Steelix, specialized in defense and taking the minimal amount of damage from currently popular meta types. Aggron has a very high max CP: 3004.
Secondly, what is Aggron weak to? Fighting Ground Water
Besides, is Aggron good in Omega Ruby?
Aggron is extremely useful as a physical attacker and a pseudo-tank (pity he can't raise his paltry Sp Def). His quad weakness to fighting is easily sorted by an iron defense or two, as is his quad weakness to earthquake. But the quad weakness to water types remains unfixed.
What is Metagross weak to?
Dark Ground Fire Ghost