So I have a few questions:
1. I'm trying to transfer Pokerus from my Cranidos to my Talonflame but it still doesn't work even though I've walked some 2000 steps.
To better answer your question:
1. the Pokerus needs to still be in the infectious stage, it will show a pink [PKRS] icon on your Pokemon's summary.. but if it's a small Pink Happy Face, then it's not and won't spread (if by chance you have the Pink Face and don't have infectious Pokerus in your possession, feel free to send me a PM and I'll give you a Pokemon with it).
2. Stick the Pokemon you want to spread Pokerus to, in the adjacent party slot. For example if you have the Pokemon with infectious Pokerus in the #3 spot of your party, then stick the ones you want to spread Pokerus to in the #2 and #4 spots.
3. You can only spread Pokerus pretty much in Battle.. So go and enter battle 2 or 3 times, don't run away, you must defeat the wild pokemons, and it should spread.. it takes either 2 or 3 battles for it to spread, just check your Pokemon's summary to verify that it is now infected.
As for your issues with Sweet Scent in the rain, I assume you're EV Training :P? for now just go train the other EV, give it about an hour or so, and the rain should stop. Also if you have the "Power items" from the Battle Maison, you can still train the EV from Route 14 (Attack), at the other place you wanted to train EVs.
If by chance you are using my guide here:
https://www.pokecommunity.com/showthread.php?p=8050492 , look at the 2nd section named "
HOW TO FULLY EV TRAIN YOUR POKEMON IN UNDER 10 MINUTES WITH X&Y (For Experts)" As this section explains how you can train the other EV stat with Hordes that don't award the stat you're training.
For example, if you're training Attack and Speed, you can still train for Attack over on Route 8 (for Speed) and literally kill two birds with one stone using this method (and is useful for when it's raining on one of the routes rather than waiting an hour+ for the rain to stop).
