1. For Dragonite to do anything in this tier, Heavy-Duty Boots should be kept in mind to bring out the full potential of Multiscale, because SR is EVERYWHERE in this tier. Also.. why Dragonite when you have Mega-Rayquaza a click away from your screen? It has access to better STAB in Flying moves, V-Create, and not as many counters as Dragonite.
2. Hatterene is slow and weak to Zacian-C and Necrozma-DM, two of the biggest threats in NatDex AG. As a psychic type, it is majorly outclassed by Calyrex-S, who is faster, stronger, can revenge kill Zacian C and threaten Necrozma-DM. On top of that, it gets access to an ability that boosts its Sp.Atk every kill it gets, Nasty Plot, and because it is fast, it can reliably use Scarf and Specs along with Aromatherapy.
3. Scizor, as a steel type, is outclassed by the popular Necrozma-DM, offensively and defensively. Necrozma has access to the ability Prism Armor, which reduces the damage of super-effective moves by 25% percent. It recieves many useful resistances and can stand up to Eternatus, another big threat. Primal Groudon cannot OHKO it unboosted, can take a hit from Zacian-C, and recieves useful utility moves like Stealth Rock and Thunder Wave. What's more is that it has access to Photon Geyser and Sunsteel Strike, two great STAB moves that ignore abilities. And offensively, it has access to Dragon Dance and can keep a Weakness Policy in due to a great ability.