Quote Originally Posted by Kusanagi
Jiraiya never told him not to use Oodama Rasengan...I believe he was referencing the demon fox's cloak 'techinique' that he did not want Naruto to use.
No he was definitely referring to the odama rasengan.

And using the red chakra seems to bring out the kyuubi, thats why yamato was controling naruto's chakra during the wind training.