Lego Undertale movie by TheDrawBlitz on DeviantArt
LEGO Minifigures Undertale Series by MisterrLokii on DeviantArt
LEGO IDEAS - Undertale - The Underground
Undertale: Ruins & Forest Set on Twitter: "Looks like Toriel's helping Frisk train to be part of a real Lego set. Here's hoping the training pays off and they do become official