Bro. Terrak cannot 1hko Lati with X-Scissors without Rocks and that is pretty shaky as well. And plus, terrak cannot beat scarf latios variants making it not a check at all. Just a heads up bro.
"Pokémon A checks Pokémon B if, when Pokémon A is given a free switch into Pokémon B, Pokémon A can win every time, even under the worst case scenario, without factoring in hax."