Cursed Mahu!!!!

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CURSES!!! i've beaten de rol lei over 25 times in vh mode to try to get the mahu but i still haven't gotten it . i beat him:

14 times with a greenill FOnewearl - this got so strong i could beat the boss before he even put his head on the raft, but it was on a borrowed memory card

10 times with a redria FOnewearl - this corrupted due to my using a non-nintendo brand memory card, so for the love of God do not use a third-party memory card, i lost 50+ hours of gameplay :'(

3 times with a pinkal ramar

the odds for this thing a 1/11 so what the heck is going wrong!!
and i don't have the online thing so i can't trade for it
any help??

I got it on hard multi with an oran and a pinkal... lol