
The best moveset for Hippowdon in the current competitive meta typically features the moves Protect, Earthquake, Rock Slide, Ice Fang.
In the Pokémon Champions meta, Hippowdon can be countered by exploiting its weaknesses (grass 2x, ice 2x, water 2x) and using effective check/counter teams.
The best item for Hippowdon is typically Leftovers, based on high-level tournament and ladder stats.