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Actually you can evolve it fine - the run is locked in time as of when it started . So your Lotad can become a Ludicolo outside of the national park but until the end of the mini run it will be a Lotad in the Park run.
I'm fairly sure we can find you if you just give us your username, assuming you aren't coming from any website besides AIM (and I guess AOL too because they're related). Either of those listed options would likely work, but if they don't, I'll be sure to let you know!