ThatOneIkemenPlayerOnMac

i've been trying to create a character on a template with these sprites and when i put the black background on transparent and run the engine to test it and... it still shows black, so... how do i fix this?

Hi everyone! This is my first visit, and I'm looking to download the character Vibri by Kuro Aonix. However, it's only available for Winmugen and Mugen, so I was wondering if someone could convert the character for ikemen go support? Please be kind!