So far I only have 2 - going for a third.
About 3 months a go in my Black2 game, my first Pokemon to reach level 100 was (female) Mienshao, that was before I challenged the Elite 4, I guess I over trained her a lot. A month later (about 2 months ago) I got my next level 100 in that same game, this time was my Watchog.
Just recently in my White 2 game I'm going to try for next level 100, my shiny Mienshao is at level 86 at the moment. She will be my next one.