Hi I'm linking both Bulbapedia and Serebii's description, they say if the move is used successfully and consecutively respectively. However, both mean that if your pokemon executes the move metronome will continue stacking (regardless of hitting the opponent or using protect). Only when switching moves will metronome lose its counter.
No, they don't. Heal Pulse is moreso a Doubles Battle Move as it heals the ally pokémon on your or the opponents side. Quick- and Wideguard protect you and the ally pokémon from spread moves like Blizzard, Precipice Blades and Origin Pulse. Protect is the way to go at a singles batle as the above mentioned attacks won't have any effect in a singles battles at all.
It generally leans towards PhysDef because most of the special threats are managed.by Chansey, while most physical threats can be troublesome for stall, like Mega Gyarados.
As you were told already, this is not the forum for anything Pokemon GO related.
From what I've found online, you cannot transfer Pokemon from the GSC virtual console to Pokemon X and Y, only to Pokemon Sun and Moon. You're probably better off asking the question here, though, since people there can most likely give you a more definitive answer.
I'm unsure on Psychic Terrain, but Future Sight is only affected by items or boosts if the Pokemon that originally used the move is in when it hits. It won't get the Specs boost in gen 7 unless you have the original user w/ Specs out when it comes down. You can also use Future Sight, then use Nasty Plot, and if you stay in the late Nasty Plot boost will still boost Future Sight's power.
Water Absorb Cacturne
Mantine, Thunder/Thunderbolt Mega-Latias (cm could suffice too depending on the circumstances), Protect Ferrothorn / Tapu Bulu and predict the Z, Clear Smog Gastrodon;
In addition to what Charmflash listed above, Pyukumuku and Shedinja are more niche stall options that wall virtually every Manaphy set used right now
Snagging an item after having your own knocked off is generally good, not bad (it's only bad if you steal Choice Specs or Black Sludge really, in which case it still has the upside of the opponent losing it). Weavile doesn't have the bulk to effectively utilize Pressure.
Pickpocket doesn't show wether you are Scarf or not, and pressure makes Weavile a bit more predictable and shows if it is Choice Band or Choice Scarf leading to some mind games - also you can snatch an Item with the ability Pickpocket if physical contact has happened in case you lost your item beforehand.
I am now woke thanks dood
