This game is a REALLY RPG. that tresoures, level up of weapons and armor is VERY GOOD! I love strategy games (RPG is a strategy game) and, a RPG game, with story and 0,001 rate, i like it. but a game 5,000 of rate and dont have a history, i dont like. THIS IS A VERRY GOOD GAME! but that is REALLY JAPONESE NO? xD
Here's some help. Challenge 1: Use Meteor Blast (Skill) or Sky Dragon (Titan) and Celestial angel to kill the black imps. Challenge 2: Use Stop (skill) to slow bomb and aim upgraded Popo's(hero) attack to hit the center for max damage by moving him back and forth when needed. and Titans Challenge 3: Use Shield(skill) until your Diablos and/or Lord of Fire goes directly on the boss and Stop (skill) to stop the atack. Then go afk for a while. Final Challenge: Max shield(skill) and charge the base while keeping invincible up. Use imps to slow the boss from advancing.