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