Running on the latest version of Demul v0.5.8 Demul v0.5.8: mega.co.nz/#!fFwwkAzJ!Xd-05Hl... Monkey Ball: www.gametronik.com/site/fiche/... Demul setup: • Demul 5.7 Asian Dynami... Demul: demul.emulation64.com/
So far i've not experienced crashing, can't be sure what your issue could be. Are you sure it's all configured correctly? (watch my demul config setup. link in the description) You can also try running it as administrator or, download the newer version 0.5.8.1 (link in the description)
Some other Japanese version games are like that (maybe in order to cater the English understanding audiences although it's actually illegal to use it outside Japan)
Get an XBOX ONE CONTROLLER AND CHARGER CORD and connect it to the computer where the emulator will connect to it to make the game much easier 😀😀😀 I RECOMMEND