Credit goes to RageGamingVideos, as seen here:
https://youtu.be/LMZh-u4MqLAThe below is what you will need:
Vaporeon @ Covert Cloak
Ability: Water Absorb
EVs: 252 HP / 4 Def / 252 SpA
Modest Nature
- Aqua Ring
- Acid Armor
- Calm Mind
- Stored Power
Here are the instructions on how to use Vaporeon properly against Greninja:
>Turn 1:Use Acid Armor. This will help you survive the first attacks from the frog.
>Turn 2:Use Aqua Ring. It will remain active until you faint.
>Turn 3:Use Stored Power. By Turn 4, the frog will forcibly reset your stats, so it’s better to chip some of its health instead of wasting a turn.
>Turn 4 and beyond:By now, the frog would have put up its shield, so it’s time to set up.
First, use Acid Armor x3 times.
Second, use Calm Mind x6 times.
Third, use the “Go All Out” cheer to buff your attacks.
Fourth, use Stored Power until the frog faints.
>“Do I need to keep anything else in mind?”Greninja’s Nightslash is your biggest threat due to its higher crit rate. Should it ever crit twice in a row, don’t risk it, use a Heal Cheer. Vaporeon in this configuration should be able to tank two hits.
>“Do I need to activate the tera type?”Not at all, you’ll have all the firepower you need to defeat the frog after the lengthy and boring set up.
