How can I type Tokyo Unicorn in Japanese?

Question:

I know the word 一角獣 which means unicorn and I also know the word Tokyo 東京, but I wanna be sure how they write it together.

Answer:

Why not 東京一角獣?

But what do you really want?
You can write some other variations:
東京ユニコーン
トウキョウユニコーン