Looking to have your noggin tested by Dr. Kawashima? Well, now you can hop on board with the Brain Training sensation, if a bit late, on the iPhone and iPod touch.

This version of Brain Training has a bunch of new activities, built-in Soduko and the ability to challenge up to three friends on the same iPhone/iPod touch. It also includes global, cross-platform leader boards and the ability to compare test scores via Facebook built right in. Available now for $5.99. [iTunes Link via Kotaku]