Here is the full list of all 12 Shutshimi achievements.
Complete Boss Rush mode. Talk about deja vu!
What a horrible night to have a sweet pair of sunglasses.
Clear 10 consecutive waves wearing the Foam Dome. Now you're drinkin' like a fish!
With the lipstick equipped, smooch a shark. I'm just after the achievement - it's not like I like you or anything!
Defeat the final terror of the sea. No bigger fish to fry!
Survive 10 waves with a score of 0. Nothing like a game of Invasion Golf!
Clear a bouncy castle round by bouncing off the floor fewer than 6 times. You should play Bassketball!
Amass a total of 53594 kills...give or take 52594.
Acquire over 9000 points in a single game. But try not to break anything.
Acquire the hero's cape. Finally, some clothing!
Clear 10 shop rounts within 2 seconds each in a single game. Don't look, just pick!
Wear 3 hats in a single game. That's called a Hat Trick!