It's a meh Shipping.

Here's my opinion about Advanceshipping.

Well this Shipping had potential, I mean both Ash and May have similar characteristics like both liking Pokemon and food. They both had some good moments together and they are good friends.

One of the moments was when Ash told May that she needed to get on that boat so she doesn't miss her next Pokemon Contest, that was a good moment for AdvanceShipping.

Advanceshipping is a good Shipping but unfortunately that Ship sunk when Drew came into the series. Yup it's because of Drew that Advanceshipping sunk and of course May and Drew having secret feelings for each other.

So I rate this Shipping a 7/10, it is a good Shipping but it can't complete with ContestShipping (again it's my opinion).

But again it's a good Shipping.