Where do you get LifeAura3?

You have to get a S Rank from beating Bass Deluxe in WWW area 3. Pretty tough...

Maybe you should try the PA \'Body Gaurd\'. You need these chips and you will also need to equip them to your folder and then select them in battle in this exact order: Dropdown S, AntiDamage S, Shadowman (1 or 2 or 3) S. After you select those, you can double your punch with the Body Gaurd if you select the Atk+20 and Atk+30 after selecting the combination above^.

You have to beat him in 22-24 seconds use stepsword then bodyguard and use a guts style so your buster attack is ten
First break his aura with stepsword then bodyguard him and keep hitting bass with your buster