Here is the full list of all 17 NAIR achievements.
Lose online
Lose offline
Win a timeout by 1 hit
Whiff 5 consecutive nairs
Hit a 5 piece combo
Win a timeout
Dodge an attack
End a set in a draw
Play a game with the hitbox viewer enabled
Nair
Dash dance 10 times consecutively
Wavedash
Shorthop
Get your opponent down to 1 health. Then get bodied
Hit a combo!
From low health, win at the last second
K.O. your opponent in only one hit