Reasonings:
>Genesis Supernova turns Mew into a ridiculous wallbreaker and sweeper, capable of plowing through even bulky resists like max HP Scizor at +2. After this, Mew can easily pick up massive damage or more kills with Terrain-boosted Psychic while invalidating priority users such as Bisharp, Scizor, and Azumarill that try to revenge kill it. With only Nasty Plot and Psychic as necessities, Mew has tons of options to get through anything it needs, including coverage moves like Flamethrower, Aura Sphere, and Dazzling Gleam to beat Dark types, Psyshock to break through Blissey, and Rock Polish to beat its usual revenge killers. We are using the precedent set by LC banning Eevium Z to ban Mewnium Z, not Mew, as Mew is clearly not broken without Genesis Supernova.
>With an excellent offensive typing, Staraptor was banned for its raw power and above-average Speed, making it either a devastating breaker with Choice Band or an ideal cleaner/revenge killer with Choice Scarf. In particular, offense doesn't have many options to deal with Scarf Staraptor, which can easily rack up kills against the majority of the tier.
>Victini is as insane of a wallbreaker as it was last generation, and it has the power and coverage to beat anything defensive. Choice Band sets especially put huge pressure on teams where it could capitalize on common Pokemon like Scizor, Cobalion, and Sylveon, with V-Create easily doing 60-70% to offensive resistances like Azumarill and Keldeo. While this was one of the more controversial bans, Victini was still warranted potentially broken enough to deserve a suspect in the future.
