BIG NEWS FOLKS! We all know Nebula Stop-the-War Lawrence, older sister of Topanga, retconned out of existence after one Season 1 episode? But would it SHOCK YOU, would it SCARE YOU, to discover that Nebula, who you ALWAYS BELIEVED was in one episode was actually in TWO?!
You see, Season 1 is more like an extended pilot of Boy Meets World. They're still figuring out the kinks. They haven't figured it out yet. Topanga's got a sister named Nebula, Shawn has a sister named Stacy. Topanga's a hippy, Cory's a wise-ass and not remotely neurotic or anxious, Eric's pretty smart, Minkus... exists.
BUT..... NEBULA IS ALSO IN AN EPISODE OF SEASON 2. In "Wrong Side of the Tracks" that's Nebbie again playing the ice skater girl that Eric has a crush on that causes him to have that dream with Nancy Kerrigan. Go check it out on Boy Meets World on Disney Plus! Here's some proof via IMDb. Is Nebbie going by a different name in Season 2? Sure. But her ill-deeds to the Lawrences has already taken place.