Yes, the best is Metagross technically but there are others that work, depends on the opposing team.
Funny you should say that, because I just played a full-health Magnezone with Jirachi @ about 70% and I won, because Maggy can't break subs after a few Calm Minds and a +4 or +5 T-bolt will 2HKO. I'll definitely try HP Ground at some point, I'm just not a huge fan of Hidden Power.
Should those 36 remaining EVs be moved to Special Defence to make it easier to set up on Latios? Or should they stay in Special Attack so each boost will hurt more?
On the subject of Memento teams, I haven't had issues. This is mainly because Gliscor shouldn't stand up to Metagross' Explosion after Stealth Rock. If he does, Scizor's Bullet Punch finishes him off. I find most Memento teams tend to fall apart after Gliscor goes down, so maybe try to keep him alive as long as possible. My short-lived Memento team had a 2 - 2 record, so I can't tell you too much about it. I was on a Poke-holiday in the Deoxys-S phase but it sounds like his Dual Screen was worse than Latios'.
Funny you should say that, because I just played a full-health Magnezone with Jirachi @ about 70% and I won, because Maggy can't break subs after a few Calm Minds and a +4 or +5 T-bolt will 2HKO. I'll definitely try HP Ground at some point, I'm just not a huge fan of Hidden Power.
Should those 36 remaining EVs be moved to Special Defence to make it easier to set up on Latios? Or should they stay in Special Attack so each boost will hurt more?
On the subject of Memento teams, I haven't had issues. This is mainly because Gliscor shouldn't stand up to Metagross' Explosion after Stealth Rock. If he does, Scizor's Bullet Punch finishes him off. I find most Memento teams tend to fall apart after Gliscor goes down, so maybe try to keep him alive as long as possible. My short-lived Memento team had a 2 - 2 record, so I can't tell you too much about it. I was on a Poke-holiday in the Deoxys-S phase but it sounds like his Dual Screen was worse than Latios'.