Disgaea 7 - How to unlock Extra Color 3 for all characters with ease (post-game edition)
3What you need:
1) A character that can decimate Mugai.
2) Play a Game trait on at least 1 item (to use on the Jumbified form).
3) One Maiko or Melodia.
4) Suisen.
5) Yoroi-Doshi evility on your character you want to unlock Extra Color 3.
6) Acceleration Mascot and/or Movement Up traits (Shoes) tho you can do the lift and throw stuff.
Essential Method:
1) Use your best character to beat the 1st form of Mugai.
2) Bring out Maiko/Melodia and allow your character to use another action (or bring out a 2nd character that can beat Mugai).
3) Equip an item with Play a Game (100,000-HL Chip has this by default) onto your character that will attack Jumbified Mugai first. Attack him and bring him down to 1 HP.
4) Bring out your character you want Extra Color 3 on (that has Yoroi-Doshi evility equipped). Place Suisen next to that character to guarantee the hit. Have them attack Jumbified Mugai.
5) GGs, you win. Enjoy the extra evility slot, Seal of Power, and Extra Color 3!
Link to spreadsheet with a bunch of awesome stuff on it, like Item Collection inventory, Item locations, Property/Trait list, and more:
https://docs.google.com/spreadsheets/d/1OX1gjiYUpPj_kCsX4X-yJOS6gnj5spFHruvJdAm2vRU/edit?usp=sharing