Quote Originally Posted by Yukimura
I forgot about Mizuchi's arc which did tie in with Oro. That makes four arcs in total that tied in with pre-established characters or plot lines in some way.

Oro's villiage: 6 eps (Season 5)
Mizuchi Flakes: 6 eps (Season 5)
Raiga Arc: 6 eps (Season 5-6)
Anko/Water Monster Arc: 5 eps (Anko pwns) (Season 6)

That's 23 out of 84 episodes and all near the beginning of the filler time. The remaining arcs were just random people with random problems needing Naruto and friends to do random things to save them.

who was mizuchi? was it the one who transformed into a tiger because oro gave him this elixir?
(the guy in the first 2 episodes of naruto)