Nickname suggestion!

[Strat]

I need some help nicknaming a Greninja (the whole froakie line but y'know) taking all suggestions!

-Strat

[0kamii]

Mizukage. Mizu = water + kage = shadow.

He's a ninja frog, so why not name him 'water shadow'?

- 0kamii

[Hojunhu]

Jiraya seems to be another nickname suitable for a frog ninja. Or, keeping with Naruto theme, Gamabunta, Gamakichi or Gamatatsu.

[Black Waterfall]

I guess we are all assuming that the Greninja you want a nickname for is male?