Here is the full list of all 32 Eryi's Action achievements.
Clear Stage 0.
Clear Eryi's Action.
Swim through the middle of some water.
Activate the secret spinning block.
Reset encroaching spikes.
Self-destruct in the Final Stage.
Enter a hidden floor.
Become a snowman.
Activate the electrobolt.
Collect all the jewels.
Enter a command in the Artie fight.
Win easily.
Make a freezing device explode in the water.
Dodge the 3rd attack to the left.
Be electrocuted.
Pick up a fiery ghost.
Go into Kerota's house.
Collect too many birds.
Hit a certain block too many times.
Be frozen solid.
Be rolled into a snowball.
Be defeated by fish-ramming.
Be defeated by burning.
Become a star.
Destroy a goal flag.
Be defeated by hot water.
Drop a sprinkler in a spa.
Hit a spiky block.
Be defeated and declothed.
Be defeated by a metal dish.
Clear EX mode.
Clear EX mode with no defeats!