General:
I did another test on item frequency because I didn’t like my first Trial (because it was too small to get a good enough estimate on minirook probability and I decided to end it exactly when I got my third minirook).
So, here are the results of my new 5000 Trial test:
Mini-Lum: 998 (19.96%)
Coin: 911 (18.22%)
Bomb: 826 (16.52%)
Cherry: 615 (12.30%)
Cake: 559 (11.18%)
Cloud: 553 (11.06%)
Fireworks: 509 (10.18%)
Minirook: 29 (0.58%)
Fun fact: You can’t throw an item while minirook is in the air.
This includes when minirook flies back after the minirook hits the opponent, after the minirook is blocked, and after the opponent hits minirook.