Super Mamono Sisters exists in a legal gray area. The original Flash game may have used:
True to the "Sisters" title, you can switch between two protagonists on the fly. Super Mamono Sisters APK Information
Since the APK is not on Google Play, sideloading is required. Super Mamono Sisters exists in a legal gray area
Super Mamono Sisters is an anime-style action-adventure game for Android featuring unique collision-based combat, exploration, and character management. Players navigate a fantasy world, using monster collisions to generate magic stones, with the game available as an APK that requires installation from trusted sources. For more details, visit TikTok. Super Mamono Sisters is an anime-style action-adventure game
Download Super Mamono Sisters APK for Android - game - TikTok
Here’s a sample review based on the typical information available for Super Mamono Sisters APK (a fan-made or indie fighting game, often inspired by Super Smash Bros. and monster girl tropes).
Practical reality: No major publisher has issued takedowns because the game is too small to attract legal attention. But that does not make it legal.