Snorlax -uber atk hp def spdef, speed is only important vs other snorlax.
Kanghaskan- at least 23 iv speed to beat kingdras, good other stats
miltank-max speed, if uber def and HP primeape can't OHKO it, uber atk, good spatk
Dragonite
Salamence
Aerodactyl Uber atk, I like good spdef/HP so lapras/jolt can't OHKO unless using hydro pump/thunder, max speed will stop most jolts from killing it unless using thunder
Tyranitar 30-31iv speed so lapras can't be faster. good other stats too, if uber def/hp arca can't OHKO it with reversal. he kills arca with stone edge if he lives
Swampert
Flygon
Rhydon
Donphan Newer battler, needs same stats as rhydon
Arcanine
Charizard- max speed, uber atk for dragons and spatk. other stats as good as possible
Feraligatr Max speed only good for other feraligatr and non max speed dragonites
S Kingdra Max speed definitely
Espeon speed at least 13iv , uber spatk, highest def possible so dragonite can't kill it without hurricane.
S Alakazam
Sceptile Uber Spatk, at least 22 iv speed,good defenses /hp. Atk only important vs phychic pokes using x-scizzor
exeggutor (simply epic stat)
S Primeape
Heracross
Scizor Important stats- speed (at least 24 speed to outspeed ttar) atk, def, spdef, hp.
Metagross 14+ speed to outspeed ttar, uber atk def. IF it has max spdef and uber HP sometimes it'll survive an arcanine flare blitz. If uber spatk psychic can kill a primeape in one hit, if not then 2 hits
S Lanturn it's an ok battler
S Magneton Same as Lanturn
Jolteon
Lapras
Slaking (if you want to do it dirty lol)
Dragon Killers -Snorlax, Kanghaskan, Tyranitar, Espeon, Lapras, Jolteon
Slaking Killers (slaking is currently unused in battle for the most part) - S Machamp, Hariyama (uber defense, HP, and atk), Jolteon, Charizard (if speed is greater, or you're lucky), Sceptile, Starmie sometimes,Espeon sometimes, S Prime if slow slak, Epic Rhydon...im sure there are others but that's good for now.