
The best moveset for Roaring Moon in the current competitive meta typically features the moves its most common attacks.
In the Pokémon Champions meta, Roaring Moon can be countered by exploiting its weaknesses (fairy 4x, bug 2x, dragon 2x, fighting 2x, ice 2x) and using effective check/counter teams.
The best item for Roaring Moon is typically Life Orb, based on high-level tournament and ladder stats.