If you are using a standard Android phone (not a gaming handheld), target MAME 0.139 or FinalBurn Neo . The newer MAME 0.26x packs are massive (100GB+) and have heavy input lag on mid-range chips.
. Elias wasn't just playing games; he was holding a portable museum, a 50GB pack that turned a simple tablet into a time machine. www.mamedev.org which specific emulator works best for your Android version or how to troubleshoot ROM loading errors? MAME4droid (0.139u1) – Apps on Google Play mame roms pack for android
Before you grab a pack, you need the right app to run it. Here are the most reliable options available today: If you are using a standard Android phone