>>49854963Groudon tends to be the most reliable, I find. Groudon's physical bulk is formidable, and only really needs to hit back once. It's shaky, and needs extra support to stop it from just switching out for free, but, it's AN option. Also priority in general, this fucker barely scraping by and outrunning and killing everything else is common enough that an extra Shadow Sneak or something on your team ain't a bad idea.
Also Paralysis. Thunder Wave can get slapped on weird stuff. T-Wave Dialga has been one of my favorite historic Ubers pokemon for just fucking up teams, but the basic idea is pretty transferable.
For doubles Zaciogre
Fukkin 1HKO moves and Destiny Bond, bruh. Sheer Cold Lapras, Scarf Bond Gengar. Good luck, and hope your uber's aren't countered by the rest of their team.