Super Mario World [SNES] 〜 "Mini-Mario vs the World", full challenge

Alternate title: what SMW would look like with DKC3's "TUFST" code.
This challenge consists in beating most of the main + secret levels without using any power-ups nor colored "!" blocks. Since checkpoints automatically give you a mushroom, this means completing most of the levels damageless AND in one go. There are, naturally, a few exceptions here and there (e.g ghost ship's invincibility star).
A pretty doable task considering you can accumulate extra lives and "save" the game every 2 or 3 stages on average; yet still requires way more skill and concentration than a normal gameplay. Some levels can end up being a nightmare (lost almost 40 lives just on Awesome 🙃).
(and, of course, this is segmented)
0:00 Worlds 1, 2 and 3
31:54 Worlds 4 and 5
54:08 Worlds 6 and 7
1:23:59 Special Zone

[@gorgogrottan]

I accidentally got the checkpoint on Valley 4 and I had to start over. Can I save at Valley Ghost and resume the challenge if i fail further along?

[@gorgogrottan]

Beat it yesterday in one session. Had to practice the Valley 4 jump on my 96 save a couple of times 😅🎮

[@EmoonX]

Sadly not... the way the achievement logic is built, picking up a checkpoint is a fail condition and there's no way to reset it without doing it all again.
Same happened to me when doing the challenge back then, and I had to redo 2 hours of gameplay 🤦 I even complained about it on the cheevo page, but alas; up to this day they didn't do anything to amend it yet.