The graphics in Maximo vs. Army of Zin look great. While they aren't 'realistic', they have a highly stylized and cartoonish feel that works perfectly within the atmosphere of the game. The textures look awesome, and the environments are fantastic. You could even say the environments look a little 'too' good. You'll go through the first few hours of the game unsure of which parts of the environments are interactive and which ones aren't. Like the last game, however, the settings never get boring and even stages in the same area of the game can have great variety. I did find one part of the game that had some slow down, but it was really just amusing more than anything else. Out of the whole game, this one little corner of a certain stage had a spot that slowed down every time.
Like Ghosts to Glory, the music in Army of Zin is just a lot of fun and really adds some perfect flavor to most of the stages. It doesn't start off quite as well as Ghosts to Glory, probably because Army of Zin didn't have the remix of the original Ghosts 'n Goblins theme like its predecessor did, but it starts off okay. The music in the second area of the game, the Haunted Forest, is a little hum-drum but by the time you get about halfway through the game, it really picks up again.
Like the music, the sound effects are best described as, well, just a lot of fun. Every sword clank, crumbling enemy and special move sounds great. The voice acting for the main characters is pretty good, though some of the repetitive lines given by the people you rescue can get kind of irritating. All in all, the sound is entertaining while often being very functional as well, and you can't ask for more than that.