A pseudo-extensive edit of Sunboy's Blackheart, giving him an actual heavy punch and heavy kick

Additional Changes:

• Mephisto mode added
• OG HP and HK are now QCF+p and QCF+k specials, "Demon Summon P" and "Demon Summon K"
• Various minute sprite fixes/details

with additional troubleshooting by Jenngra505, amielkpo, and Giuseppe