Okay, so I've tried downloading Children of Mana onto my Acekard 2i (AKAIO 1.7). I tried two or three roms from different places with different names (if that helps). Every other game works, btw, so I know it's a problem with the ROM. So I turn on my DSi, right? I click "Danny Phantom" (the disguise for the Acekard, apparently) to access my flashcard. My SD? I believe it was Sandisk. Then I click "Children of Mana". Yellow "loading" appears, as normal. But then I get two white screens. :-[ I back up everything, format the card,and put everything back onto my acekard (took me ages). But no luck. I'm a complete tech noob, by the way. If there's any "patching" involved, please walk me through it, since I've never patched anything in my life. Someone please help me. Please. I just looked up some very vague gameplay videos and the gameplay reminds me of Zelda: A Link to the Past, which I LOVED. Thanks for your time.
If you use the official version 4.21 acekard loader (akmenu4) from http://www.acekard.com/download.php with akaio the game will work, just put it in the ak2loader folder in __aio on your sd card and then set it to use it on the rom properties in akaio - read here http://gbatemp.net/t233930-children-of-mana-problems-with-akaio-1-7