In "The Trojan Smurf" the backpack vacuum device that Gargamel uses to capture Smurfs is similar to the leaf blower he would use in The Smurfs (2011).
In "Smurf the Other Cheek" when the Smurfs weep over Papa Smurf's departure to find a cure for the "spot", Smurfette, Vanity, and Handy are in the shot, but Handy is the only Smurf who doesn't cry.
The title "Smurf the Other Cheek" is from the old Christian doctrine "turn the other cheek", which refers to responding to injury without revenge and allowing more injury.