I actully caught a shiny numel in emerald today by luck
and i have no idea if i can evolve it or not..
I have played this game over 1000 hours and I havent seen any shinies exept for in the batte frontier. >_>
And this is your second shiny, I'm taking this shiny when you come here.
Anyway yeah evolve it.
The funny thing is that how i got it.
Well I opened the gameboy (it was my first time since a while) to try the trading/Batteling cable.. and in my way to the hospital my first encounter was with a shiny numel =P