I think the article should focus on the fan-made MUGEN content featuring Ben 10. I'll write a detailed guide. I'll cite the following sources:

Let's open the MUGEN Archive page for more details. page mentions Ikemen GO, which is an open-source MUGEN engine that has an Android build. That's a key alternative.

Ben 10 MUGEN Android is a fan-made, action-packed fighting game that brings the massive roster of the Ben 10 universe to your mobile device using the versatile MUGEN engine.

Open your mobile MUGEN emulator, navigate to the extracted folder, and launch the MUGEN.exe or main executable file. Gameplay Tips and Tricks

Only download from reputable MUGEN community channels, well-known YouTube creators, or open-source archives.

Mobile-optimized builds come with overlay gamepads, though external Bluetooth controllers are heavily supported. System Requirements for Android

: Run downloaded APKs and ZIPs through an online scanner like VirusTotal before opening them.

For the most dedicated fans, you can download individual characters and stages to build a personalized Ben 10 MUGEN experience.

Download Ben 10 MUGEN Android: The Ultimate Guide to Alien Fighting Games

Because this is fan-made content, you won't find it on the Google Play Store. That means you’ll be using third-party websites.