I dont have that badge either, even though i should. Also when i beat tomb of the beguiler recently with a new wizard, it said "Mander Savior badge discovered." I was supposed to get it, not discover it. Now in my badge list it has "????????" instead of "mander savior."
If you have all of those Badges, then you have completed all of the quests in Pyramid of the Sun, the Krokosphinx, Tomb of the Beguiler, and the Tomb of Storms, respectively. NOW HERE'S THE LAST QUEST....
Go into the Deck Shop. The Shopkeeper should have a Yellow ! over his head. He tells you to go to the WC Housing Shop and then to Kirby Longspear in Colossus Blvd. after you turn in this quest, CONGRATULATIONS!
Besides the deck shop quest, I find that a lot of my characters missed a quest in the royal hall. It doesn't appear untill you are well into the tomb of storms. I would go back to the royal hall after you finish krokotopia and check to make sure you finished that quest.
the crok quest that many grandmasters miss doing is the one that is found and starts in a mb post office... so if you don't have a krok quest left and don't have the master of the oasis badge then you should try poking your nose into the four various mb post offices... one of them likely has your missing krok quest