Just press z to continue the dialogue, then look inside. It's already explained inside but you can change - The picture - The speed - The sound that plays when talking Pretty much everything you need, right?
Feel free to use this! Just make sure to back-pack the sprite and credit me! If you do use it I would love if you leave me a link to the project :3 All code by me. The temmie on the screen was doodled by me. Sounds, characters, and Undertale belong to Toby Fox. * I STILL DON'T KNOW WHAT AN UNDERTALE IS * chill bro