Some opinions:
Please, please don't drop this. Corviknight does kind of suck here because of the Coalossal meta, but the second people figure out that Sandaconda is the true best mega it will come back. Regardless, while more defensive megas is a cool idea, I don't think it should be done by buffing a mon thats already viable.
I'm of the opinion to still keep it banned- With Coalossal forcing strong fire resists onto teams, this thing actually gets better as it can get around most of the better Coal checks (slowtwins, pex sortof, etc) and I'm generally sick of Fire-types. For its mega, it will either be ass or gamebreaking so I think this problem mon should be kept out of here for the time being.
Some megas I think are ass:
This mon is so fucking stinky. Run the calcs sometime, its a worse urshifu with hustle accuracy. I think this mon needs a full overhaul or at least a significant buff/nerf (dropping hustle), but at the moment its just a terrible, terrible pick.
TL;DR: Slate it
I kind of like this mon as is, being a faster defensive fairy compared to clef, but if it truly wants to succeed in that niche it needs to be faster than Duraludon so it can switch in, even on Flash Cannon, and then outspeed and OHKO with Moonblast. Also maybe replace Stockpile with a better move, like Stealth Rock or Knock Off so it can have at least a shred of the utility Clef has? Just a thought.
TL;DR: At least +2 Speed, -Stockpile +Stealth Rock/Knock Off/Spikes/Whatever
Idk if this needs a buff or anything, but I believe Defiant is hurting this thing's viability. The fact that it can't come in on Mandibuzz' Defog simply because it will die to the Foul Play that follows is just so, so unfortunate in this meta. In a vacuum this thing should work but when it goes from hazard deterrent to Defog bait simply because the best hazard control in the meta appears in team preview isn't a good look. Might be worth looking at, I really like the concept of Copper Mines but this thing invites the best remover in and base copper stinks. Give it like Stamina or something.
TL;DR: Defiant is not good in Mandibuzz zone. Change it maybe.
I love the fact that this is the fastest mon in the meta, I just think it needs a bit of tuning to really make it work. Make the Poison and Psychic coverage Special instead of Physical (Sludge Bomb, Psychic, Shell Side Arm if you're feeling creative), siphon some of the Attack into Special Attack, give it Calm Mind for flavor and boosting, and change the ability to something, anything more appealing than crit fishing. Like Neuroforce or something, idk it keeps the sniper flavor by hitting weak spots.
TL;DR: -Old Moves, +Psychic, Sludge Bomb, Calm Mind, -10 Atk +10 SpA, -Deep Focus, +Neuroforce or smth
This thing is a mess of a concept. Theoretically, a flex mega should be a sidegrade to the existing base form and have appealing surprise factor. While this mega does nuke Amoonguss out of existence, it still loses to Tang and Head Smash on base form (Banded Head Smash is virtually as strong- STAB and Band equal out, all u get is the extra attack) makes it around the Flyings regardless. Makes it really hard to justify using this when the combo of Base Rilla+Coalossal does that same while keeping Grassy Terrain around. Surprise factor is cool but not enough. I think it needs to radically change its matchup spread to really work as a flex mega. This was a really long way of saying "full rework".
also it doesn't make sense how does this guy head smash he fused with a massive drum set
TL;DR: Slate the musical jungle
I fail to see the appeal of this mega. It's slow, lacks recovery, and mono-poison isn't really worth much in the current meta. If it had some sort of way to counter Urshifu (secondary typing/bulk boost+smth like spiky shield to stall Wicked Blow? Fairy works as a flavor type with the toys lol) or had a secondary steel typing to blanket check more stuff it could be more appealing. Or maybe just reliable recovery. Regardless, needs a buff.
TL;DR: Make into Ursh counter with +Fairy Typing/+Steel Typing/+Recover/Slate it
This thing is shockingly bad when you think about what its trying to do. As a defensive Grass-type, it's infinitely crippled by a Fighting weakness, meaning it loses to the Fightings that grasses love to pivot into and also has a much worse matchup against Zeraora. As a Normal-type special sponge, the Grass typing adds a plethora of weaknesses that undermine this role (suddenly loses to Kyurem, Rotom-Heat, Volcarona, etc). As a grass type booster/breaker, run Rillaboom or even its mega. It's just worthless. Can't ever see a situation where this is better than Tangrowth/Amoonguss/Mega Apple/Blissey/Baselax.
TL;DR: Slate this
It's still awful~
TL;DR(lol): Slate this
Don't give a rat's ass if we buff this but it would be kind of hype to distribute the moves to the eeveelutions lol