My life would suck without you
Just expanding on Syd a bit.
The word contest should be there as the only requirement of getting it is beating the Elite 4. And if you're really worried about making the Pokéblock, you could wait for the Blend Master to come around, and then you will get pretty much perfect Pokéblock every time. If you're worried about the beauty as well, you could save before you feed them and test that it evolves before you save.