Dragon Pulse is pretty horrible on Charizard. You're carrying a non-STAB 90 Base Power move that hits like three things in NU for super effective damage, and Charizard is already really cramped for moves as it is. As it stands, you have to choose four moves among Fire Blast, Flamethrower, Air Slash, Focus Blast, and Hidden Power Grass. Throw Dragon Pulse into the mix, and you're even worse off. Fire Blast is pretty much a given, as is Air Slash. So you have to choose what's least important out of hitting Rock-types with HP Grass, hitting pretty much every special wall in the tier with Focus Blast, or having a more accurate Fire STAB to spam. Dragon Pulse is pretty awful, and I don't think it has any place on any Charizard set in NU. I honestly think that Metang is fine where it is in Low A-rank, but I'm not that opposed to it moving up either. It is a really effective Pokemon right now, and it's not hard to find defensive partners for it because of its asston of resistances and its only two weaknesses. Glalie is fine in Top D-rank. Over other Spikes setters, it has Ice STAB, Explosion, Taunt, and Endure (which can be used with Custap Berry to guarantee at least one and often two layers of Spikes). Dragonair for Top C-rank is cool. RestTalk DD is really nice, and it's one of the few decent checks to Charizard out there. And finally Eelektross for Top A-rank is a really good idea. It's still one of the best wallbreakers out there, and it's a menace to stall because of this. Outside of that, it's a really strong slow pivot, which is a godsend for offensive teams. No, it doesn't take hits the best, but its special set with Leftovers>Choice Specs makes up for the middling bulk. Plus, immunity to Spikes and Toxic Spikes makes it hard to wear down with passive damage.