The requirements for unlocking both Achievements and their related Trophies,

• You will need Meister Gloves for 100% increasing the time window for Perfect Guarding, as well as resetting your Perfect Guard.
  If you don't have Meister Gloves, Adept Gloves should work as well.
  
  
• You will need at least 25% in the Solid Guard modifier to strengthen your shield and prevent 100% damage taken from failed Perfect Guarding.
  You might also need to be using the Fire element for resistance(?)
  
  
• Increase Defence for the rest of the gear.
  Avoid Pin Body as much as possible or your enemies will die quicker through absorbed damage repelled back.

I use Meister Gloves & Unbreaking Fist, with 500 Defence for the rest of the gear.

This Guide will allow you to obtain the following Achievements.

This Guide will allow you to obtain the following Trophies.
Not including the above Achievements tied to Trophies.

This takes place within Gaia's Garden - Peridot Approach.
Head west after Teleporting here, and you'll come across two Papagun birds next to each other.



Lure them to the north-western wall across the stream, they won't fire their Watermelon bombs by being here, and you won't get knockbacked from failed Guarding.

Time your Guards and you'll register x16 Perfect Guards or Guards every 5 seconds upon successful attempt.