The Sewer Rat is the boss of Macro Zone in Super Mario Land 2: 6 Golden Coins. It is a large rat with a spiked nose.
In Super Mario Land 2: 6 Golden Coins
The Sewer Rat is fought in the level Final Boss: One Mighty Mouse!. During its boss fight, Sewer Rat runs up walls and into pipes before reaching the top of the ceiling, where it falls straight down onto Mario. To defeat Sewer Rat, Mario has to either jump on it three times or throw six fireballs at it. Upon defeating Sewer Rat, Mario obtains one of the Golden Coins.
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| Characters | Protagonists | Mario • Heavy Zed • Hippo |
| Antagonists | Wario | |
| Bosses | Bosses | Big Bird • Sewer Rat • Tatanga • Three Little Pigheads • Pako & Poko • Witch |
| Worlds and levels | Tree Zone | Invincibility! • In the Trees • The Exit • Honeybees • Final Boss: The Big Bird • Secret Course 1 |
| Space Zone | Moon stage • Star stage • Secret Course 2 | |
| Macro Zone | The Ant Monsters • In the Syrup Sea • Fiery Mario–Special Agent • Final Boss: One Mighty Mouse! • Secret Course 3 | |
| Pumpkin Zone | Bat Course • Pumpkin Zone Level 2 • Pumpkin Zone Level 3 • Witch's Mansion Course • Secret Course 4 • Secret Course 5 | |
| Mario Zone | Fiery Blocks • Mario the Circus Star! • Beware: Jagged Spikes • Final Bosses: Three Mean Pigs! | |
| Turtle Zone | Cheep Cheep Course • Turtle Zone • Whale Course • Secret Course 6 | |
| Overworld | Mushroom Zone • Hippo • Scenic Course • Mario's Castle • Casino | |
| Enemies and obstacles | Enemies | Ant • Aqua Kuribō • Battle Beetle • Bear • Bee • Bee Fly • Bēro • Blurp • Bomubomu • Boo • Bopping Toady • Būichi • Bullet Bill • Cheep Cheep • Chikunto • Dokanto • Dondon • F Boy • Floating Face • Goomba • Goronto • Grubby • Honebōn • J-son • Jack-in-the-Box • Karakara • Keipu • Kiddokatto • Koopa Troopa • Kyororo • Kyotonbo • Kurokyura • Minikyura • Mōgyo • Neijī • No.48 • Noko Bombette • Para-Goomba • Pikku • Piranha Plant • Poro • Ragumo • Rerere • Shark • Skeleton Bee • Spikey • Spiny Cheep-Cheep • Stars • Tamara • Terekuribō • Toriuo • Tōsenbo • Unera • Unibō • Venus Fire Trap |
| Obstacles | Boulder • Cannonball • Crystal ball • Falling spike • Fire Pakkun Zō • Furizō • Genkottsu • Guruguri • Karamenbō • Lava • Spike Pillar • Tatenoko • Tōsanbōru • Turtle Cannon • Wakiri • Yashichi | |
| Items | Items | 1-Up Heart • 3-Up Heart • Carrot • Coin • Fire Flower • Golden Coin • Moneybag • Mushroom • Starman |
| Objects | Objects | ? Block • Beach Ball • Bone Lift • Bonus Bell • Brick • Cloud • Cog • Empty Block • Fiery block • Goal • Invisible/flashing block • Mid-Point Bell • Skull Platform • Soap bubble • Tree sap |
| Forms | Forms | Small Mario • Super Mario • Fire Mario • Bunny Mario • Space Mario • Aqua Mario • Invincible Mario • Bomb Mario |
| Miscellaneous | Locations | Mario Land |
| Other | Gallery • Amida Game II • Mario Catcher | |