Board Thread:General Discussion/@comment-24673185-20140312084312/@comment-1538219-20140313130601

No one brought this up yet so I'll do it:

Raiga's case is very unique. Though originally a filler character in a movie, Bardock was introduced in the manga, thus making him a canon character. That's the abridged version of what's on my Facebook status. Anyways, it seems that Kishimoto has done the same with Raiga and made him a canon character by implementing him in the mainstream canon.