How to mod dialogues in Undertale [UNDERTALE] [Tutorials]
Image 4 - UndertaleModTool for Undertale - ModDB
UndertaleModTool: Community Edition [Pizza Tower] [Modding Tools]
Bettytale : An Undertale Mod (W.I.P) | Glitchtale Amino
Game Jolt - Share your creations
So apparently someone's made an Undertale Mod Development tool. :: Undertale Discussions générales
Steam Community :: Guide :: Future of modding | Data.win
Help with UnderateModTool : r/UnderModders
How To Mod Undertale - YouTube
GitHub - ShadowMario/UndertaleModTool-DE: The most complete tool for modding, decompiling and unpacking Undertale (and other Game Maker: Studio games!)