what are the best counters for this thing in singles?

so far what I've only thought of
>scarf mold breaker excadrill

is it just me or this pokemon is stupidly overpowered (not necessarily in smogons metagame, but just in general)?
>fairy/ghost type basically impossible to wall
>access to swords dance and all kinds of utility move and good stabs
>disguise legit the most broken ability in the game that's available to non-legendaries