Never had the chance to properly introduce myself because the WL3 and 4 NSO icons were ending soon, but hi I'm noobmurderer34, big fan of WL4 and Shake It, and I also do a lot of DDR, so combining them resulted in the Wario themed dance mat! A...
If S-Hard didn't count, then I'd have to reconsider. But yeah, you're right. Hard is pretty much just Normal, and the Normal difficulty is just a very polite way of saying Baby Mode.
Wario Land 4 is a weird one, since I think it could probably be counted as both the easiest and hardest game depending on what difficulty level you play it at.