Here is the full list of all 82 HoloCure - there are Save the Fans! achievements.
Complete all achievements. Then go outside.
Catch a Shiny Fish
Clear a stage in Hardcore Mode.
Defeat the Boss of Stage 3 (Hard)
Have 1,000,000 coins.
Defeat the Boss of Stage 2 (Hard)
Clear a Hard stage without taking any damage from projectiles.
Clear a (Hard) stage without taking any Healing Items.
Clear a stage with Main Weapon at level 1 only.
Have over 500 HP in 1 run.
Fail a +1 > +2 enhancement.
Catch at least one of every kind of fish.
Get Manager Level 4
Collect 100,000 HoloCoins from workers at once.
Harvest at least one of every kind of crop.
Retire a Worker.
Level a worker to their maximum level.
Get 50 combos in the fishing minigame.
Complete the armory.
Clear a stage with no items.
Clear a stage only choosing the first option when leveling up without rerolls.
Wait out the entire 15 seconds on Iofi's special without drawing anything
Pet Bubba as Amelia Watson
Watch the TV for 10 seconds.
Clear a Stage in Time Mode
Clear a game of Stage Mode without moving at all.
Clear a game of Stage Mode without using Special after unlocking it.
Watch the credits to the end.
Reach 10 minutes with Cutting Board or related weapons using certain characters.
Deal over 10000 damage in one attack.
Leave a boss alive for 5 minutes or more.
Huh?
Defeat the Boss of Stage 1 (Hard)
Defeat the Boss of Stage 4
Defeat the Boss of Stage 3
Deal over 1000 damage in one attack.
Clear with only your main weapon.
Clear stage mode without having any Character Skills (Fandom off)
Unlock all characters.
Get a weapon to +10 enhancements.
Get over 100% crit chance in a single run.
Cook a dish.
Harvest a plant.
Annoy another member.
Get 10 combos in the fishing minigame.
Defeat a 10 or 20-minute Boss in under 10 seconds.
Fail enhancements 5 times in 1 run.
Survive to 30 minutes with Halu item level 5.
Reach level 100 in one game.
Choose the Haste Stat Up option 10 times when leveling up.
Achieve 1,000,000 score in a single run.
Level up 5 times in a row within one second.
Be defeated while using Halu.
Use the Golden Hammer
Clear any stage while using Sake.
Complete a stage while using Super Chatto Time.
Defeat the Boss of Stage 2
Get 4 Collab Weapons in 1 game.
Defeat a Yagoo.
Be defeated by a Yagoo.
Clear with Halu item level 5.
Don't take any damage for 5 minutes.
Drop a super item.
Reach level 50 in one game.
Unlock and use a character's Special.
Steal a fish from another member.
Go to Holo House
Complete your first game.
Complete a stage using Plug-In Type Asacoco
Have 5000 coins.
Defeat at least 5000 targets in a stage.
Defeat the Boss of Stage 1
Take a total of over 500 damage in one game.
Defeat a Golden Yagoo.
Eat over 50 hamburgers in one game.
Defeat a Silver Yagoo.
Lose after 10 minutes in a game.
Destroy a Yagoo statue
Defeat Fubuzilla.
Use an anvil
Enhance a weapon once.
Open a Super Box.