In A Tattler's Tale, it's the first episode where Collin Dean provides Lincoln's voice, after original actor Grant Palmer's voice changed due to puberty.
In "One of the Boys", four main voice actors from Teenage Mutant Ninja Turtles (2012) - Sean Astin, Greg Cipes, Seth Green, and Rob Paulsen - provide voices for 4 of Lincoln's "brothers" Loki, Loni, Luke, and Lane.