Well... since it wasn't shown as resolved.... I'm not sure if it'll be considered necro posting, anyways!
What you want to do is, have a "clear" (meaning it has no graphic) event in the spot you want your specific event to touch to trigger. You could! have a parrellel process that conintuously updates that specific event's X and Y coords. and compares it to the "clear" events X and Y goords. (It could even be the clear event) and when the difference of specific event's X and clears X coords is equal to 0 aaaaand their Y coords as well, it can then his a switch (self switch if you made it the "clear" event) and then on the next event page, set as auto run... It's a little complicated. I can't script, so I try different ways to use events... its a messy proccess, but at least I understand it.... Hope I could help (you or anyone else who searches this)
if you are making this be like a chain reaction in a set event (like you make dog event move to dog bowl, when touch dog bowl, make slobbing noises, and then empty bowl) you could easily just set it up so that when the "dog" moves to the bowl, it plays sound effect, then throws switch "eat's food" and the bowls event, when "eat food" is on, turns to empty bowl.... *shrugs*