Press the buttons simultaneously (or the assigned "Option/Menu" button) to bring up the internal MAME menu. Select Cheats from the list.
Move the cheat.dat file into your MAME4droid directory: Internal Storage > MAME4all > cheat.dat (or the equivalent folder designated by your emulator version). Step 2: Access the In-Game Cheat Menu Cadillacs And Dinosaurs Unlimited Gun Cheat Android
If you prefer or a Bluetooth controller ? Cadillacs And Dinosaurs Unlimited Gun Cheat Android