Yo por lo menos con el juego en el R4 se queda "pillao", con las dos pantallas en blanco, aunque leí de uno en GameFAQs que sí podía, sin trimear la rom y sin activar el soft reset, pero ni así...
EDIT: Hm, veamos, acabo de encontrar esto...
http://forums.r4ds.net/showthread.php?p=24642
En especial resalto este post:
"Same problem here!!! So, I've looked through many threads, so let's refresh the problems! Visually, the problem is anyone connecting with the Wii using R4, M3, or something of that sort will end up with a locked up beautiful double white screens! Cause of the problem, Flash carts like R4 and M3 patch up the rom before letting you play the game, which causes problems in sending an UNSIGNED code to the Wii, and the Wii CANNOT read the unsigned code. Also the only reason why the G6 or whatever DOES work, because it doesn't patch up the rom, just runs the rom as if it's the real game, and therefore sends a SIGNED code. If I got anything wrong, someone tell me, and fix it up for me! Next up, us R4 users want a Pokemon patch so we can transfer our Pokemon over to Pokemon Battle Revolution ASAP! If the R4 Team reads this, thank you in advance for you effort, time, and most of all, SPEED! Thnkas again!"
Vamos, que por ahora si no se tiene un G6, nada de nada. De todas formas, como se dice, lo más probable es que con la próxima actualización del firmware se pueda.