Did Twilight and Rainbow Dash kiss?
There is no evidence that Twilight Sparkle and Rainbow Dash have ever kissed in the official My Little Pony: Friendship is Magic series. While the show portrays strong friendships and bonds between the characters, their relationships are primarily platonic.
It's important to remember that fan interpretations and headcanons exist, but within the official canon of the show, a romantic relationship between Twilight and Rainbow Dash has not been explored.