Since I made one of these for 100%, I figured I may as well make one on All Castles since the current world record of 1:35:29 doesn’t use the most up to date route and doesn’t have as detailed of splits as some may want. Refer to the rules if you want more details on the category itself.

Throughout the run, you will want to stay as Acorn Mario whenever possible. There are 3 “safety” acorns that you can pick up in case you get hit and I would recommend picking up at least one of them. You can obtain Acorns in levels 1-1, 4-1, 5-2, 7-1, 7-T, and 8-4 if you get hit right before any of them.

The route itself goes as follows: 1-1 1-2 1-T (You can get your first safety directly after this level by going back on the mini-map.) 1-3 1-4 1-C 2-1 Nabbit 1 2-3 2-T (You can get your second safety between this level and 2-4.) 2-4 (Secret) 2-4 (Normal) 2-6 2-C 4-1 4-2 4-T 4-3 (You can get your third and final safety between this level and 4-4.) 4-4 4-GH 4-C Nabbit 2 3-1 3-2 (Use the first P-Acorn that you obtained in the Nabbit chases here.) 3-T 3-Ghost Ship 3-3 3-5 (Use the second P-Acorn that you obtained from the Nabbit chases here.) 3-C 2-S (This level is taken instead of 5-A because 5-A is an incredibly long autoscroller with an RNG based boss fight at the end.) 5-1 5-2 (Secret) 5-7 5-C 6-1 (Directly after this level, switch to Nabbit.) 6-2 6-T 6-4 6-5 (Secret) (Switch to Mario after this.) 6-T2 6-C 7-1 7-3 7-T 7-GH (Secret) 7-C 7-A 8-1 (If you lost Acorn and have no safeties left, take the secret exit.) 8-2 8-3 (8-4 instead of the two levels above if you lost acorn.) Elevator Bowser

There's only one place where Nabbit is used in the run at this point, so the playing field is pretty level between this category, Mario, and Toadette.