Youre not gonna believe this. I downloaded a popular omega ruby mod with no Wurmple on RT 101, patched the original, booted it up, got Wurmple. That sparked an idea. I have the game saved right before the first 101 encounter. I thought, maybe the game has a Wurmple encounter saved because Ive already entered the Route. So I defeated it then walked around, got the modded mon! So I tried re-patching everything fresh with just Mew, booted it up, got Wurmple as expected, but second encounter was Mew. Clearly, the game registered an upcoming Wurmple encounter as soon as I entered the Route, and that couldnt be undone by modding the table. I am assuming I will be good from here... Thanks for your help!