@typhlosion Oh, that one's easy.
It's kinda ridiculous that it's not in there yet, considering some of the other stuff that apparently deserves to be immortalized in codepoints. (How is cannabis less important and universal than, say, Mother Christmas? Why are there _eight_ emoji just for alcoholic drinks?)
As a bonus, combine any person (or animal) emoji with the cannabis emoji, and their eyes become pink-tinted and half-lidded.