Hallo Lord Cambernon!
I'm glad you have been enjoying my game! :D
Many questions here, I'll do my best to answer them!
1 & 2. There is indeed, its related to your second question actually. It is also one of the missing achievements you're looking for.
3. Unfortunately not, there isn't a lot to see either. Its the farmhouse in Moo Moo Farm in MK64 though!
4. The huts are accessible, another achievement as well. I'd suggest looking carefully in that area. Try to avoid the beavers though... They aren't very friendly. The Scuttlebug island is accessible through the wizard, not sure why the wizard would only teleport you to once place though?
5. There is! They like the houses a lot but don't want to get too close, try checking outside the third one.
6. There is one I highly doubt you'll find. It is called "It's a secret to everyone", super secret achievement. The others shouldn't be too difficult though! Try finding my egg on the second island and talking to me. That is another achievement!
7. One ending only unlocks after collecting more than 75 hams, it is the only way to curb the king's appetite!
8. That would be telling ;)
9. The one where you can find my avatar is one, there are others if you look carefully. My favourite is if you stand in a spot for a while... another is if you clip out of bounds and enter a place with a friendly frog among not so friendly clowns.
Hope this helps! All the best, Scrib🥚