Looking for an anime where the main protagonist wears a white top and a shorts, has a sword on his back with a red grip and summons a robot or some kind of a suit by using a "COMMA" shaped locket wherein the boy stands on a golden dragon..he has a fat short dark guy as his sidekick who has a mechanical robot too.
I watched this like 7 years back.
The series is Mashin Eiyuuden Wataru. The boy in white is the title character, Wataru - since he was wearing shorts, you must have seen Cho Mashin Eiyuuden Wataru, the last sequel series from 1997. Here's his outfit in the Cho Wataru series, and the robot he summons, Ryujinmaru:
By the way, the comma-shaped item he wears is actually shaped like a magatama, a type of curved bead that was a cultural tradition in Japan thousands of years ago.
His stocky companion is Shibaraku, who, like many of the characters in the Wataru series, has his own robot - Senjinmaru:
magatamathough they crop up in all sorts of anime – thrig Dec 4 '17 at 15:15