Yes, the token will enter the battlefield, and the ability will trigger. Before that trigger can go on the stack, the legendary rule is applied and you'll have to get rid of one of them, but both will have triggered.
Private Mod Note
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DCI Level 2 Judge
Scientists have calculated that the chance of anything so patently absurd actually existing are millions to one. But magicians have calculated that million-to-one chances crop up nine times out of ten.
Scientists have calculated that the chance of anything so patently absurd actually existing are millions to one. But magicians have calculated that million-to-one chances crop up nine times out of ten.