Choose Spider as your character. Grapple (A) and then press A + up or A
+ down (after this move the opponent should be on the floor with their
legs facing you). When they are on the floor press A and you will do a
move which damages their leg health. When the move ends and the
opponent gets on to his feet repeat the process (grapple, then A + up
or A + down the A when the opponent is on the floor).