In "Bad Luck Smurfs," when Lady Luck confronted Gargamel in the room where the Wheel of Chance is located, her dress has sleeves. In a brief close-up shot, her dress is sleeveless, but in the following shot, the sleeves have reappeared.
In "Bad Luck Smurfs," after being free, Lady Luck was able to pull open the door of the dungeon where Gargamel kept her and then break down the door in the Wheel of Chance room indicating that she is very strong. However, strong as she is, she was unable to free herself from the sack until the Smurfs helped out.