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here's the alternate interpretation of the wonderland maze...
each of the 5 grass areas will have mushroom mons, otherwise starting from top left and moving clockwise you can also encounter Growmeo/Tuliep in the first area, Peppit in the second, Chihaha in the third, Chegrin next, and finally Larvyn and Cuppy in the middle.
all wild pokemon in the maze will be lv.5 but have unique egg moves or rarer abilities than normal. (or not, IDK, I'm just brainstorming reasons for it's existence other than, Lel, Alice)
Also there are a fair number of trainers and nice items to find.