Yeah, so overview needs to be reworked a bit. It doesn't make much sense to say that Slowking faces competition from Slowbro when Slowking is a better Assault Vest Pokemon than Slowbro. Also, you can't talk about the changes from the previous generation, as these analyses are supposed to be timeless and still accurate even when XY is a past generation. These are generally the things that need to be addressed in an overview: Stats, Abilities, Movepool, Typing, Niche, Competition.
So, you know, talk about special bulk, somewhat disappointing physical bulk, regenerator, wide movepool and scald and stuff, mixed bag with defensive typing, how it is effective since it is quite a niche Pokemon, and then cons in the form of other Pokemon that often eclipse.
The moves for this set are fairly self-explanatory.
Just take this sentence out, if they're reading the explanation, chances are it's not self-explanatory for them, and it doesn't add anything. And this is just my personal thing, but it really bothers me when the moves aren't explained in the other they appear in in the moveset.
Other moveset stuff, I think Psychic > Psyshock because Mega Venusaur is usually physically defensive, and Psyshock doesn't hurt Clefable enough anyway. And stress that Ice Beam hits Dragon-types harder. Gliscor's not that relevant, but it hates Scald anyway.
He can also scout most special attackers due to this major special bulk, as Choice specs Thunder Bolt latios can barely 2hko Slowking.
This example is pointless, Specs Latios isn't a thing.
Slowking does have the ability to take some physical and mixed attackers, mainly weaker ones like Gliscor and ones he resists, such as Gyarados and Infernape.
Gliscor isn't really a physical attacker, and regular Gyarados and Infernape aren't relevant. I wouldn't really bother with physical attackers beyond "Watch out for Pursuit trappers" and stuff because Slowking is not equipped to take them on. Also make a mention of Regenerator pivoting.
Electric and bug pokemon can U-turn out on Slowking and pokemon like Scizor can constantly check Slowking, ruining any chance of your team maintaining momentum.
*sees Fire Blast and raises eyebrows* Also, make sure to state Volt Switch.
And with the massive attack move pool, the two can threaten the majority of the meta outside Mega Venusaur, Bisharp and Mega Scizor.
Weird sentence, reword or remove.
And yeah, reformat Checks and Counters. Tag me when you've done these, and I'll stamp it.