Sarasaland Adventure v4.0 (SMBX) - Strawberry Starship (6-7)
7Info: https://rpgmaker.net/games/4216/
This is an...interesting looking airship level. Hmm. While this strawberry pink colored level is difficult and long, I don't think it's as grueling as 6-6 is, though there are some spots that can be pretty nasty. The Rocky Wrenches are easily the most troublesome enemies to deal with here, especially in Mario's autoscrolling section as they tend to be close to other enemies like bulletbills and such. Take them out ASAP so you don't have to worry about their wrenches in addition to the other obstacles and enemies you have to deal with. If you manage to keep your Yoshi from 6-5, he helps out quite a bit.
Peach's section, while it doesn't autoscroll like Mario's section, does seem like it does at times as it requires you to ride a thin rocket-like part of the ship through several waves of enemies in some areas, but is otherwise straightforward. Electro Peach or Ice Peach is best to deal with the Rocky Wrenches, or failing those, there's always the strawberries or other enemies to throw onto them.