Lady Bat is a boss in MegaLion 3 who replaces Shade Man. She is a vampire bat.
Info by Jer
"Lady Bat is one of the female Biobots. She is can easily swift gravity between high or low level. She is a vampire bat, she drinks her favorite meal (furry blood). She also likes fashion type of clothes, her favorite is Chinese's clothes. If you mess with her, she'll turn your world upside down."
Lady Bat resembles Rouge the Bat from Sonic Adventure 2.
Lady Bat's info quote: "she'll turn your world upside down," refers to the fact she was made to replace Gravity Man in MegaLion 2.