Alternate costume:
Complete Story mode. Begin Story mode under the Hard difficulty setting to unlock an alternate costume.
Giant Rasengan:
Summon a Shadow clone and the use the Charged Rasengan. Instead of being a Normal Rasengan it will be a Giant Rasengan.
Wind Style Dragon Rasengan:
Complete Story mode under the Easy difficulty setting.
Wind style Rasengan
After getting the “Shadow Clone Croll 2” Summon the Shadow Clones and use a Charged Rasengan. It will be a Wind Style Rasengan.