He can be decent, but isn't the top teir.
AOE armor break BB is useful and sparks well with many other attacks with not a whole lot of windup before release. Leader skill is generic and trumped by others which are more focused. He sees a bit of use as lead in rainbow arena builds. Regular attacks combo well with others, with the exception of his final hit being a bit delayed off of his main stream of hits. Although, unlike lava, the tail end of his attack which is delayed isn't the bulk of his damage.
Final status below.
http://bravefrontierglobal.wikia.com/wiki/Pixy_King_Leore
Base 3,278 1,017 785 918
Lord 4,946 1,386 1,049 1,348
Anima 5,526* 1,386 1,049 1,202*
Breaker 4,946 1,553* 904* 1,348
Guardian 4,946 1,225* 1,214* 1,348
Oracle 4,362* 1,386 1,049 1,501*
*Final, in-game stats may differ slightly.
Leader Skill: Dynasty Power
20% boost to Atk Power of all types
Brave Burst: Heavy Riposte
(Offense)
10 Combo Earth Elemental Attack on All Enemies & probable Weak Effect