Dogtanian was a toon that had one of those theme tunes you just couldn't stop singing. A bit like Willy Fog, but even MORE annoying. One for all and all for ONE. GRRRRRRR!!!!!! It featured Athos, Porthos, Aramis and an aspiring musketeer called Dogtanian.
Dogtanian, during the early episodes, had to prove himself to the other 3 that he was true Musketeer quality. Come about episode 8, they allowed him into their trusted friends group.
On the baddies side there was Cardinal Rishleau, and obviously the Musketeers worked for the King.