No, no, the glitchiest game was the original SMB. Not only can you do the minus world trick, but you can also pass through walls, make Mario "dance", walk off of platforms and float on air, swap palettes, glitch sprite graphics, and do many other things. You can even warp backward like in SMB2 if you use some Game Genie code and do something else. It's been a long time since I've done it, but you enter the code, go to the first Warp Zone, enter any pipe, and be Warped to the 1-1, but with glitchy graphics and the tendancy to crash the game if you jump alot.
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"We get signal. Somebody set up us the bomb!" "What you say!" "All your base are belong to us!"
-Last Alert (PS1)