Android blocks installations from outside the Play Store by default.
Naruto Senki Mod By Riicky 1.17 is a popular Android fan-modification of the 2D fighting game featuring an expanded roster of over 30 characters with updated visuals and abilities. Designed for offline play, this APK modification is tailored for Android devices and brings enhanced character transformations to the game. For more details, visit Naruto Senki Mod By Riicky 1.17 Apk- Download
Go to your Android device's Settings > Security (or Privacy) and toggle on "Install from Unknown Sources." Android blocks installations from outside the Play Store