I honestly know I should stay out of this one, but I can name two checks to Zangoose.
Support Armaldo can come in on Facade fairly easily, taking a max of 37% from it, and hit back hard with Stone Edge or X-Scissor for a near-definite OHKO off of Close Combat's defense drop.
Haunter can come in on anything but Shadow Claw and beat Zangoose to the punch with a Quick Attack immunity and STAB Sludge Bomb, and can carry a Sash in case of anticipation.
Two counters really isn't much, especially when one of which falls outside of its main niche to operate as a counter, and falls in line with the oft-supported ban.
Support Armaldo can come in on Facade fairly easily, taking a max of 37% from it, and hit back hard with Stone Edge or X-Scissor for a near-definite OHKO off of Close Combat's defense drop.
Haunter can come in on anything but Shadow Claw and beat Zangoose to the punch with a Quick Attack immunity and STAB Sludge Bomb, and can carry a Sash in case of anticipation.
Two counters really isn't much, especially when one of which falls outside of its main niche to operate as a counter, and falls in line with the oft-supported ban.