Don't bother trying to play on a tablet. None of those emulators have the proper hacks. Get on your laptop and try bsnes_v087-32bit.
First, patch the original Japanese rom. (The limited edition Shonen Jump rom won't work.)
Make sure to include the .xml in the same folder as the rom, and make sure the name is exactly the same as your rom.
The first initialization screen will appear. Press the A Button, wait for the confirmation, then reset.
Then the second initialization screen will appear. Press B Button this time, wait for the confirmation, then reset.
The game should begin at that point.
If it doesn't work, despite the xml and rom being named the same, in the same folder, and the initialization screens appeared, the only remaining possibility is that you're pushing the wrong button, instead of A or B as prompted, which will also cause the initialization to fail.