Banned for not stating your guess.
banned for you're Greek. I could have done much worse.
What the hell is that supposed to mean? Speak up Draak 
When American films, games, or shows are shown over there, do they do any dubbing or do most people know English and they just let it be?
If they do dub, do they do it in Greek with a Greek accent or Greek with an American accent? I've seen films dubbed in Spanish, but they use a Mexican accent (guess the country I found the film in). I found that weird since we have actors speak English, but we'll most often have them try to fake another accent for character's sake.
What the..... 
What do you think Greek people are? Some kind of uneducated gipsy-like people? 
If you must know, most Greeks speak at least some English, but with a terrible accent, and watch A LOT of american movies.
Now, to answer your question, No we dont dub any foreign movies, or shows or whatever else. 90% of foreign stuff projected on TV has Greek subtitles, since we CAN read 
(yes I am being kind of ironic)
1 Greek TV channel used to dub some American TV series and shows, but they just dropped it, because everyone finds it kinda lame. Now they use subtitles like the rest of our channels, and they are doing better in numbers as a result of that. Consider that TV channer the 2% of the dubbed TV shows, movies and series.
The other ~8% (dubbed), are movies like Shrek, Over the Hedge, Ice Age, etc. Kids animated movies, are usually dubbed in Greek, for obvious reasons (little children arent great at reading).
Simple answer: No.
"Cute Pokemon always get Parahax!"
