Nezumi Man is a Homage/Parody to the classic NES Mega Man games, starring a rat who can run, slide, jump and shoot like the Blue Bomber himself. He has to stop the plans of Big Bad Dr. Gyoniku and his henchmen, along with seven other rat and ratlike characters. And a kangaroo whose name means "rabbit".
This game is surprising for its lower difficulty compared to other Mega-clones, especially once you get their patterns down (or have their weaknesses). Despite this, it's still fun to play, mostly because of the completely original concept.
- An Ice Person: Ice Nezumi
- Animate Inanimate Object: Ice and Smoke Nezumi, the former being a fridge, the latter a puff of smoke, both with rat faces.
- Arcadia: Butter Nezumi's stage. Well, almost.
- Art Shift: Delay Nezumi's face looks noticeably different from the others.
- Barrier Warrior: Butter Nezumi
- Cosmetic Award: Each weapon you get from a boss also comes with a piece of costume for Nezumi's swag, which he wears on the "weapon get" screen. The full costume's also his armor in Special mode.
- Eye Beams: The Big Bad's giant mecha's second form.
- Instant Awesome, Just Add Dragons: Dragon Nezumi
- Let's Play: Raocow has managed to finish one.
- Meaningful Name: Everyone whose name contains "Nezumi" is a rat (or has a rat face---see Animate Inanimate Object above), since that word is Japanese for "rat". Also, Dr Gyoniku's name means "fish meat", which probably explains why he looks like the way he is.
- Mega Neko: The giant Maneki Neko boss of Gyoniku Stage 3. Then again, the hero is a rat.
- Mouse World: Dr. Gyoniku's secret lair appears to be in some sort of two-star motel. Actually, it's in a doghouse shaped area next door.
- No Cartoon Fish: Well, none that aren't Dr. Gyoniku or his mecha-machines.
- Non-Indicative Name: Usagi, if you know Japanese.
- Odd Name Out: Usagi again, being the one without "Nezumi" in the name. It helps he's the only non-rat in the group.
- Prison Episode: Delay Nezumi's stage is one of them, with all the feel of a standard medieval dungeon. Even the boss wears jailhouse stripes and has an ugly mug to match.
- The Smurfette Principle: Wave Nezumi is the one female in the boss list. Also she's quite fond of Making a Splash.
- Shout-Out: For the first boss fight against Dr. Gyoniku, you fight him inside a Dr. Mario screen. As for the Special Mode, we might as well be playing Ghosts N Goblins. (This bonus game is called Gyonikumura, because Makaimura is the original Japanese name of Ghosts 'n Goblins.)
- Stealth Pun: Milky Way Nezumi, the star-shooter.
- Unexpected Gameplay Change: The Special stage you obtain when you complete the game.
- Widget Game
- You Dirty Rat: Averted outright. All the rats in this game are actually likeable, especially Nezumi. The only true villains are apparently fishmen like Dr. Gyoniku.