Here is the full list of all 62 Charlie II achievements.
Defeated Boss in World 1
Score 100% in training level 1
Score 100% in training level 2
Score 100% in level 1-1
Score 100% in level 1-2
Score 100% in level 1-3
Score 100% in level 1-4
Score 100% in level 1-5
Score 100% in level 1-6
Score 100% in level 2-1
Score 100% in level 2-2
Score 100% in level 2-3
Score 100% in level 2-4
Score 100% in level 2-5
Score 100% in level 2-6
Score 100% in level 3-1
Score 100% in level 3-2
Score 100% in level 3-3
Score 100% in level 3-4
Score 100% in level 3-5
Score 100% in level 3-6
Found the secret exit in level 1-1
Found the secret exit in level 1-4
Found the secret exit in level 2-1
Found the secret exit in level 2-4
Found the secret exit in level 3-1
Found the secret exit in level 3-4
Found all Super Hearts in World 1
Found all Super Hearts in World 2
Found all Super Hearts in World 3
Defeated Boss in World 2
Defeated Boss in World 3
Score 100% in level 4-1
Score 100% in level 4-2
Score 100% in level 4-3
Score 100% in level 4-4
Score 100% in level 4-5
Score 100% in level 4-6
Score 100% in level 5-1
Score 100% in level 5-2
Score 100% in level 5-3
Score 100% in level 5-4
Score 100% in level 5-5
Score 100% in level 5-6
Score 100% in level 6-1
Score 100% in level 6-2
Score 100% in level 6-3
Score 100% in level 6-4
Score 100% in level 6-5
Score 100% in level 6-6
Found the secret exit in level 4-1
Found the secret exit in level 4-4
Found the secret exit in level 5-1
Found the secret exit in level 5-4
Found the secret exit in level 6-1
Found the secret exit in level 6-4
Found all Super Hearts in World 4
Found all Super Hearts in World 5
Found all Super Hearts in World 6
Defeated Boss in World 4
Defeated Boss in World 5
Defeated Boss in World 6