Google for “Αστερίκιος εν Ολύμπια.” The first link has a number of different comic books.
They can be purchased from Amazon: http://www.amazon.de/Asterix-bei-Olympischen-Spielen-Altgriechisch/dp/9602202661
And here’s Max and Morris:
http://www.amazon.de/Max-und-Moritz-auf-Altgriechisch/dp/3150185262/ref=pd_sim_14_3/280-6677968-1061368?ie=UTF8&refRID=1R99P6MQ1GWG3PFKKMMZ&dpID=51UK%2BBASvdL&dpSrc=sims&preST=_AC_UL160_SR104%2C160_
And check out bedwere’s Ben-Hur threads on the Latin forum!
Any idea if the Asterix’s are any good? Generally I’m not so interested in these translations of new works into Greek, but Asterix is something I grew up with. I’ve almost ordered one of them several times already. I was able to find two or three pictures of Asterix in Greek from Google, but that’s not enough…
I own the four books. The translator is a famous Greek professor (I can’t give you the name right now since I’m on travel). It looks like good Attic Greek to me.
Thanks for the plug, Joel! 
Ἀστερίκιος καὶ Κλεοπάτρα ISBN13: 978-960-321-175-4
Ἀστερίκιος ἐν Ὀλυμπίᾳ ISBN 13: 978-960-220-266-1
Μεταξὺ ῥόδου καὶ ξίφους ISBN 13: 978-960-321-036-8
Ἀστερίκιος παρὰ Σακχαραζάδι ISBN 13: 978-960-321-449-6
P.S.
I found the name of the translator:
Φάνης Κακριδής
But is it easy Greek? Are they easier to read than Xenophon? Easier than Chariton?
For those who want to get a good idea of Asterix in Ancient Greek, ‘Asterikois en Olympia’ is fully available for online reading here.