Here is the full list of all 22 Takotan - there are 星のタコ achievements.
Defeat Shark Meat.
Defeat King Krunky.
Defeat Skullfo.
Defeat Sticky Treat.
Defeat the Star Snatcher.
Defeat Mechanoid.
Defeat Metal-Octonaut and Octomaton.
Defeat Master Brain.
Beat the game on Normal Mode.
Beat the game on Panic Mode.
Achieve a x10 multiplier.
Complete Custom Mode: | From the start of LV1 | Shield: <= 500 | Lives: <= 3 | Speed: +2 | Powerups: Off | Weapon: Ninja Stars |
Complete Custom Mode: | From the start of LV1 | Shield: <= 2000 | Lives: <= 3 | Speed: -2 | Powerups: Off | Weapon: Bowling Ball |
Juggle a Metal Man for 10 seconds.
Juggle 3 Metal Men for 10 seconds.
Collect a chain of 5 gems.
Collect 200 gems in one playthrough.
Beat the game on Normal Mode with no deaths. (Assist Mode Off)
Die 5 times in one playthrough. (Normal or Panic Mode Only)
Dodge a total of 250 times.
Recover in a pinch.
Enter a cheat code on the titlescreen