Well, *puts on nerd glasses* according to the FNAF wiki, Foxy is not 'triggered' by anything, but simply randomly appears. Also, it's apparently possible to not look all the way at him. If you manage to turn away before looking directly at him you can flip up the monitor and he may go away.
Or something like that. Basically it's possible NOT to get jumped by him and make him disappear.
Also Bonnie has no phantom form, but seems to simply be represented by spring trap. Who even gets called "spring Bonnie" in one training cassette phone call.
Note : Yes, FNAF
WIKI. But their's is actually pretty legit. It seems to be kept up very professionally.