Here is the full list of all 160 Shonen Idle Z achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Reach monster level 450
Complete all rank S missions
Defeat the 40Th boss
Complete collection at 100%
Reach monster level 400
Kill 1500 bosses
Kill 8 M monsters
Kill 1250 bosses
Kill 1100 bosses
Kill 7 M monsters
Kill 6 M monsters
Kill 950 bosses
Complete all rank A missions
Kill 800 bosses
Kill 5 M monsters
Collect 30 pets
Collect 27 pets
Kill 650 bosses
Collect 24 pets
Collect 30 clothes
Kill 4 M monsters
Complete collection at 80%
Collect 27 clothes
Kill 3 M monsters
Kill 500 bosses
Complete all rank B missions
Reach monster level 350
Gain 2500 shonen power
Get 10 party companions
Collect 24 clothes
Kill 400 bosses
Get 9 party companions
Gain 1337 shonen power
Get 8 party companions
Gain 1000 shonen power
Collect 21 pets
Play 5 months
Kill 300 bosses
Collect 21 clothes
Play 3 months
Play 4 months
Get 7 party companions
Gain 500 shonen power
Defeat the 30th boss
Complete collection at 60%
Reach monster level 300
Play 2 months
Reach monster level 260
Kill 2 M monsters
Collect 18 clothes
Gain 1 QaD global ki
Collect 15 pets
Collect 18 pets
Gain 250 shonen power
Have 150 K training points
Collect 15 clothes
Kill 200 bosses
Complete all rank C missions
Have 130 K training points
Collect 12 clothes
Complete collection at 40%
Get 6 party companions
Collect 12 pets
Play 1 month
Have 110 K training points
Gain 150 shonen power
Collect 9 pets
Collect 300 treasure chests
Gain 1 Td global ki
Collect 9 clothes
Have 100 K training points
Have 90 K training points
Kill 150 bosses
Gain 100 shonen power
Reach monster level 220
Gain 1 Dd global ki
Get 5 party companions
Have 80 K training points
Kill 1 M monsters
Have 70 K training points
Collect 6 clothes
Complete all rank D missions
Defeat the 20th boss
Collect 200 treasure chests
Complete collection at 20%
Gain 1 Ud global ki
Reach monster level 180
Have 60 K training points
Gain 1 Dc global ki
Get 1 No attack points
Gain 1 No global ki
Have 50 K training points
Kill 100 bosses
Get 1 Oc attack points
Play 3 weeks
Kill 750 K monsters
Gain 50 shonen power
Reach monster level 150
Collect 150 treasure chests
Get 4 party companions
Have 30 K training points
Gain 1 Oc global ki
Collect 6 pets
Get 1 Sp attack points
Play 2 weeks
Kill 500 K monsters
Reach monster level 120
Have 20 K training points
Gain 1 Sp global ki
Get 1 Sx attack points
Kill 50 bosses
Gain 1 Sx global ki
Defeat the 10th boss
Get 1 Qi attack points
Collect 100 treasure chests
Reach monster level 90
Collect 75 treasure chests
Get 3 party companions
Collect 3 clothes
Have 10 K training points
Collect 50 treasure chests
Get 2 party companions
Gain 5 shonen power
Gain 10 shonen power
Have 5 K training points
Get 1 Qa attack points
Kill 250 K monsters
Play 1 week
Gain 1 Qi global ki
Kill 100 K monsters
Reach monster level 70
Collect 25 treasure chests
Play 1 day
Play 3 days
Kill 10 bosses
Get 1 party companion
Get 1 T attack points
Gain 1 Qa global ki
Collect 15 treasure chests
Have 1000 training points
Collect 3 pets
Kill 5 bosses
Reach monster level 50
Collect 10 treasure chests
Get 1 B attack points
Gain 1 T global ki
Kill 10 K monsters
Collect 5 treasure chests
Gain 1 B global ki
Kill 1 K monsters
Get 1 M attack points
Reach monster level 30
Get 100 K attack points
Gain 1 M global ki
Reach monster level 20
Have 100 training points
Gain 100 K global ki
Reach monster level 10
Kill 100 monsters
Kill your first monster