The tts voices have been manipulated in such as way as to make it sound close to the original sound effects, so it isn't just some voice saying damage sound or something. Click the t in generator to see temmie, and click on sans' face, type ex in the dialog, switch to undyne, mettaton, or asriel, to see their undying, neo, or hyperdeath forms! Generate gifs and pictures with undertale/deltarune dialogues.
Undertale And Deltarune Text Box Generator.