But deep down, he has a heart of gold. This is the first time that Gargamel transforms into a Smurf in the cartoon show. And Hefty as the Smurf of Christmas Future shows Grouchy what his refusal to participate in Christmas will cause on the day of Christmas. A Christmas Carol , Grouchy noticeably refuses to participate in the celebration of Christmas , so Papa Smurf whips up a formula that would help his little Smurf regain the Christmas spirit he had lost. She smells it, says that it smells like poison, and throws it out of the window.