From Emil Chronicle Wiki

King Roper is a level 10 monster.

[edit] Stats

Basic	Combat
Level 10 Experience 5,500 Job Experience 5,000 HP 10,400 SP 0 MP 0 Behavior Aggressive	Type Plant Boss Skill A.SPD 3.18 ATK 46 - 79 DEF 55 - 2 C.SPD 3.00 M.ATK 69 - 146 M.DEF 90 - 2
Properties Earth(20%) Item Drops Persona, Catty Booster, King Roper Stamp Skills  ??? Location Staff Desert