I find this thread interesting! (don't come to these parts often enough)
Well, even mild Dyslexia would throw off even an easier name. I'm comfortable with how I say 'em, and most that roll off my tongue are pretty darn close to the universal fandom.
Except, Gardevoir that is. Most trouble there but then I heard one (a female one?) pronounce itself on the English "Super Smash Bros. Brawl" and I said "Close enough." with shoulders shrugged. I'm aware that you can have Japanese audio & text on SSBB but I just want to get to the violence right away. 8-)
Anyway, one should never pronounce the fully mature form of Ralts with a 'Garden' (of Good and Evil) sound in it. And what really helps me even try to say it is thinking of a type of furniture that I can't spell similar to the pokemon. My mom has this furniture. It starts with a 'arm--' something.
PokeBalls are biodegradable. Don't litter.