18.
Sneasel was one Pokémon that benefited strongly from the Physical/Special split in Gen IV.
Before, both of it's STABs were effectively crap due to Ice and Dark moves being classified as special, which didn't work with it's poor Sp. Atk stat.
In Gen IV, it can make much better use of moves such as Pursuit, Feint Attack, Ice Punch, and great priority through Ice Shard.
It is a little trickier to use in Gen VIII due to the omission of Pursuit and Feint Attack, imo.