Somethings I wanted to say about this thread for a while now:
1) Yes, please stop talking about other Mega Evolutions here, since some of the posts pertaining to them don't even mention Greninja at all.
2) Please don't use this thread as a "help" or "suggestions" thread for your own in-game Froakkies/Greninjas and their Hidden Powers/IVs and such. This is meant to highlight competitive possibilities for Greninja, so if you have questions like those, please go to
the simple questions/simple answers thread for your needs.
3) Please don't bust your nerves trying to get or prove the viability/existence of specific moves on Greninja. Seriously, if you really wanted to spinblock your Spikes, just U-turn to a Ghost-type and there you go, and I doubt discussion on Rapin Spin would prove useful unless there was proof it actually learned it. Again, its competitive movepool is totally your choice, but I'd rather not have to look at a bunch of pages panicking over the fact that Greninja doesn't have a certain move.
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And now that that's settled,
it's set making time!
name: Offensive Spiker
move 1: Spikes
move 2: Hydro Pump
move 3: Ice Beam / Hidden Power Fire
move 4: U-turn / Hidden Power Fire
item: Life Orb
nature: Timid / Naive
ability: Protean
evs: 4 HP / 252 SpA / 252 Spe
Your basic special attacking Greninja, basically designed to revenge kill threats, outrunning even Tornadus-T and Alakazam and giving general offensive team a fast way to utilize entry hazards without resorting to Skarmory or Ferrothorn (who have their advantages in defensive typing). Only the last two moves are debatable due to 4MSS, but Ice Beam and Hidden Power Fire are for coverage, while U-turn is great since it allows Greninja to scout and switch to a Ghost-type in front of Rapid Spinners. Hidden Power Ghost can go here, but is generally unnecessary on this set, and it's better to use offensive Ghost-types for your needs.
name: Special Attacker
move 1: Hydro Pump
move 2: Ice Beam
move 3: Hidden Power Fire / Grass Knot
move 4: U-turn
item: Life Orb
nature: Timid / Naive
ability: Protean
evs: 4 HP / 252 SpA / 252 Spe
Very similar to the previous set, but plays differently in that it suffers from less 4MSS, and its goal is to basically hit-and-run anything that doesn't resist its coverage. Hydro Pump, Ice Beam, and U-turn are pretty much non-negotiable, and the third slot is up to preference depending on what you need firepower against. Grass Knot, in particular, is used for an immediate option against Gastrodon and Jellicent without having to rely on teammates.
name: Physical Attacker
move 1: Water Shuriken
move 2: U-turn
move 3: Waterfall
move 4: Ice Beam / Return
item: Life Orb / Choice Band
nature: Naive / Jolly
ability: Protean
evs: 252 Atk / 4 SpA / 252 Spe
This is more of a tentative set and may not be everybody's favorite, but... it takes a physical approach and advantage of Greninja's decent 95 Atk, and the fact that it has Water Shuriken, an invaluable move against Volcarona, Speed Boost Blaziken, and Dragon Dance Charizard-MegaX, amongst others. Protean also causes Greninja to receive STAB on U-turn, which threatens to OHKO Latios, nearly OHKO 252 HP Latias with SR, and is just an awesome move to use against just about any Pokemon in general. Waterfall is used for a stronger Water-type move. Ice Beam and Return are used for coverage and power, but Ice Beam would be much better with Life Orb to KO Dragon-types and achieve some coverage against Grass-types. Return is fine for good coverage with Water, and having STAB and high BP. Note that Night Slash is not used here due to U-turn having similar coverage and base power, but can be used for Jellicent.