Looks like pokemon advanced challenge is appearing on 23rd of october as pitcher_ross correctly pointed out. Well assuming that the radiotimes (i.e one of the UK's leading TV guide's) is correct!
http://www.radiotimes.com/jsp/listings_search.jsp
Then type pokemon on the right hand box where it says "Search for a current TV programme by name". You get a list of the upcomming pokemon episodes on sky one/sky one mix (not including any other channels like toonami etc). I you look at the bottom, it says:
Sunday 23 October, 8:30am, Sky One:
Pokemon Advanced Challege (if you click on it says "What you seed is what you get"
Sunday 23 October, 10:00am, Sky One Mix:
Pokemon Advanced Challenge (Also "What you seed is what you get")
Sunday 24 October, 8:30am, Sky One:
Pokemon Advanced Challenge (wait for it........"Love at first flight" yes after all the dispute of being banned, we get to see it first time round lol)
Sunday 24 October, 10:00, Sky One Mix:
Pokemon Advanced Challenge (Love at first flight again)
Check every so often for more updates on whats coming up.
For some reason I don't seem to hate sky as much anymore. Just hope they stick to their word!