I am well aware of the existence of Super Mario Bros. 1, 2, and 3. I will even acknowledge Super Mario Bros. 4, as it is the Japanese subtitle of Super Mario World for the SNES. But never would I ever have believed that Super Mario Bros. 17 exists. As it turns out, it certainly does, though it's not an officially licensed product! I wonder if Nintendo even knows about it! Or, more importantly, Capcom...
"Wait, wha-- I don't even-- hold the phone! Capcom doesn't have anything to do with Super Mario Bros.! Why do they care?" I'll tell you why they care. It's because Super Mario Bros. 17 isn't a Mario game at all: it's a rip-off of Chip 'n' Dale's Rescue Rangers for the NES! What's really sad is that not much has actually been changed. Most of the graphics for Chip and Dale (the chipmunk rangers) have been replaced with Mario and Luigi — though still with a tail — and a few sprites have been altered to reflect the Mario universe. Some powerups were changed into mushrooms, and a couple of generic enemies were changed into Bowser, Yoshi, and Spiny. It's funny, though, because the ending sequence still features Chip 'n' Dale. Maybe the reprogrammers never got all the way through the game.
And, for some reason, Mario is now called "Mali" and Luigi is "Lugi", which is a bit too close to "loogie".
Other than that, the game is identical to the original. It's strange why anyone would even bother to do this. I guess the Mario brand is just so powerful, even in the pirate world. Here are some screenshots, just to give you an idea of what has changed or has remained unchanged: