Why didn't Naruto ever use his little kyubbi form transformation in combat?

[Theunrestricted]

It could make for easy trickery if used properly like his Sexy Jutsu on the battlefield.:heh:

 

[Your Creepy Stalker]

It drained a lot of chakra, if he used it he would essentially be running on 5% power for the rest of the fight.

 

[Pukkake Pokayo]

It takes drama away from all previous and future transformations.