It's really up to you. Making your own nickname will make you have a stronger bond with your greninja, but here are some that you might like:
Nightshade
Shinobi
Blackwater
Anura
Shadow Toad
Assassin
That's just a few that you could use, but it's really up to you.
Frogadier evolves into Greninja at level 36.
Oscar Ovies goes by The alpha male.
There are many nicknames for the Queen of England. Some of these include Her Majesty, Elizabeth II, as well as Lillibet.
shaggy
Greninja does not learn Ice Beam by leveling up. You will need to teach it TM13 containing Ice Beam.
Greninja is #658 in the national pokedex, and it is a Water-Dark type Pokemon.
Greninja is not in Pokemon Emerald. It was first introduced in X and Y, which came out after Emerald.
Ed and Eddie are nicknames for a male with the name Edward or Edwin. Emmy is a nickname for a female with the name Emily or Emilia.
Female: Avian, Raven, Shade. Male: Shadow, Boss, Hocus.
what are 10 pokemon that resemble ninjas OR fighters for example lucario greninja blaziken
experiments'
60
Frogadier evolves into Greninja at level 36.
Greninja Item :Life Orb Nature : Timid Moves: -Hydro Pump -Dark Pulse -Ice Beam -Extrasensory
Polly is a nickname for a female with the name Mary Phil is a nickname for a male with the name Philip Pauly is a nickname for a male with the name Paul
Gary
Some common chola nicknames include Lil Loca, Smiley, Shorty, and Chiquis. These names often reflect elements of the chola subculture's tough and expressive attitude.