I wanted to get the true ending, I really did - but the game eventually exposed its deep RPG roots and gated my progression behind a boss who was simply beating me on numbers rather than strength or tactical ability. Disappointing, but I still had a fun 20 hours romping through deeper-than-usual musou action.
The game looks great - a vibrant palette and expressive character animation makes this feel like a Toriyama manga come to life. The 'super' moves are particularly incredible.
I'd recommend this to both beginners and veterans of musou-action games alike. A must for Dragon Quest fans, too.
COMPLETION: I got the first ending and unlocked all the characters but couldn't be arsed getting the proper ending.