Here is the full list of all 22 Ookibloks achievements.
Clear Chokki Beach
Complete a single daily challenge
Win three prizes in one game of Ooki Balls
Earn an 'S' rank
Clear the Hermit in Chokki Beach stage 3!
Get the maximum chain possible on Chokki Beach stage 5
Clear Hole in the Ground stage 2 without breaking the rock blocks
Clear out all of the enemies in Hole in the Ground stage 6
Clear Twinkle Bay stage 5 while only defeating two enemies
Clear all the enemies in Twinkle Bay stage 7
Clear Mount DoodeeDoo stage 1 while only destroying three rock blocks
Clear Mount DooDeeDoo stage 2 without defeating the burning mushroom
Get a perfect combo on Myoo stage 1
Clear all the enemies in Myoo stage 3
Clear Mantangogo stage 1 without defeating any enemies
Get a perfect combo on Matangogo stage 3
Clear Lake ChiriChiri stage 6 with only two water changes
Clear all of the hermits in Lake ChiriChiri stage 4
Defeat the ghost kitty in stage 5 of the Frozen Wastes
Clear Frozen Wastes stage 9 in under 40 seconds
Clear Hani Hallow stage 3 with a perfect combo
Clear Hani Hallow stage 7 without defeating any enemies