From Emil Chronicle Wiki

Rock Eater is a level 40 monster.

[edit] Stats

Basic	Combat
Level 40 Experience 405 Job Experience 250 HP 930 SP 100 MP 100 Behavior Aggressive	Type Insect A.SPD 3.50 ATK 125 - 165 DEF 100 C.SPD 2.00 M.ATK 80 - 112 M.DEF 84
Properties Earth(50%) Item Drops Solid Pebble, Metallic Stone4, Critical Crystal, Iron Sand, Metallic Stone, Metallic Stone2, Rock Eater Stamp Skills  ??? Location Iron Volcano, Iron South Street