Think about it, youre in the middle of a boss fight, and you turn to your companion Stezer/Tifa/Cait Sith/Wakka. "HEY WE NEED YOU TO PULL OFF THAT SUPER POWERFUL MOVE YOU DID LAST TIME AND FINISH THIS GUY OFF!"

"Sure thing buddy! Just a sec"

He/she/it then proceeds to pull a slot machine out of thin air and goes a round.

Oh darn! seems I've made two hits and a miss. The slot machine then returns to pocket space and your pal decides to summon a bunny or play a friendly game of catch with the enemy or something.

What the hell dude!?

The enemy then proceeds to breath fire on you and you all fall down