Too many to remember, though I don't think I've got any past Sapphire. I do remember a few, though:
-Several Mewtwos, not at the same time unless they were traded to Crystal.
-Mew, though I can't remember if it was Rare Candy'd or trained.
-In Crystal, I raised an entire party of Persians to 100 because I was in a "get filthy rich" kick, and so I beat the Elite Four using almost nothing but Pay Day, possibly more than once. (I got filthy rich.)
-And I had a Feraligatr who I raised to at least 93, but I can't remember if I ever finished and I can't check because Crystal's battery died.