When you watch a movie you have to have popcorn and coke.
"映画を見る時はポップコーンとコーラに限るよね、"
- When you watch a movie you have to have popcorn and coke.
- It's got to be popcorn and coke when you watch a movie.
映画を見る時ポップコーンとコーラって最高の組み合わせだよね
- Popcorn and coke is the best combination when you watch movies.
- The best combo for movies is popcorn and coke.
When watching a movie, one of the best combinations there could possibly be is of popcorn with coke.
ご質問ありがとうございます。
「画を見る時[ポップコーン](https://eikaiwa.dmm.com/uknow/questions/39500/)とコーラって最高の組み合わせだよね」と言いたいなら、英語で「When watching a movie, one of the best combinations there could possibly be is of popcorn with coke.」と言えます。
ご参考になれば幸いです。