Meditite dont chek sneasel, knock off do more than 90% damage and then Sneasel only has to use Ice Shard.Why do people think that Sneasel counters Tangela, Meditite, Gigar, Missy, or Yanma? All of those Pokemon run common moves that OHKO it. So that's another common misconception.......
It should also be noted that Meditite and Tangela actually check Sneasel, though not very reliably.
Also, that slippery slope "we ban Sneasel we ban all gen 5 ubers so we can't ban Sneasel" counter argument doesn't make any sense. First of all, all of those Pokemon would need to be tested in a Sneasel free environment and if they are broken (like they have been the past 2 gens) then sure, they will get banned as well....so what? Having 5-6 Pokemon on a ban list is still pretty small even considering the smaller Pokemon base there is for LC. It's like saying "oh we can't ban Rayquaza/Kyogre because they check <list of Pokemon they check>". Think about that for a second.
And that we are saying is that Sneasel has to be banned at the time the pokemons are gonna be broken in a Sneasel free enviroment can be banned too