Games like Gash And the Ultimate Boner

If you finished Gash And the Ultimate Boner, the closest matches are Oddworld: Soulstorm, The Last Tinker: City of Colors, The Secret Monster Society: Chapter 1 - Monsters, Fires and Forbidden Forests, AdventureQuest Worlds and Supraworld. All 10 share its adventure genre and are ranked by how closely their themes and modes overlap.