@Sunny_Rio I don't know how to prevent the moodlet from appearing entirely, since I'm not sure what causes it. To remove a moodlet from an unplayed sim, you can use NRaas MasterController; you'd also need the MC Cheats add-on. Click on the affected sim and select NRaas > MasterController > Intermediate > Moodlets > Remove Moodlet, and select Wonderland from the list. You could also run this on batches of sims by clicking on City Hall and selecting NRaas > MC > Sim > Intermediate etc. and choosing the sims you want.
If the moodlet is caused by being in the future or some other recurring state though, they'll just get it back. There may be a way to disallow a specific moodlet entirely, but I'm not sure. The best place to ask would be on the NRaas site, in Chatterbox; there are a number of players who are happy to answer questions on that site.
The mod that fixes a broken walkstyle is NRaas DebugEnabler, but that's only necessary if removing the moodlet doesn't do the trick. (I guess it might help if the Wonderland moodlet is permanent, since the walkstyle might not be reapplied if the moodlet isn't also reapplied, but I haven't tried in a situation like that.) On a sim, choose NRaas > DE > Options: Smartphone > Reset Walk. You can also run the command via City Hall. Be careful with some of the DE commands though: they're EA's built-in debug commands, and not all of them have been tested and proven safe for regular use.