by default, ez5 runs roms in hybrid mode, auto save type detection, high speed, etc., but for if that doesnt work, we use clean mode, we create an .ini file for that rom with all the settings and it runs in clean mode
i have managed to connect my DS to wii, but my card is EZ5 and i used clean mode (btw, with japanese pokemon ranch you will need a JP rom, but my USA room savefile worked with JP rom)
for those with flashcards, i have managed to do a DS-to-Wii connection, with an EZ5, clean mode rom. for ranch, i just copied my usa savefile, renamed it for JP rom and it worked
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan