So over the week I managed to:
Finally complete The Bouncer's Survival Mode as Dauragon C. Mikado (Awakened) and unlocked Sion's Jet Black costume for Vs Mode.
Complete The Legend of Dark Witch's Normal Mode as Zizou (with all upgrades and Syega Crystals) and will be completing Lunatic Mode.
Complete Cave Story's Boss Attack mode and will consider doing a second playthrough to unlock Curly Story.