|Location||Boney Tunnel (PM)|
|UMA Book Description||Rare metal-laden Onii. Fast and strong.|
Onii Metal is an Onii. It is very fast and hard to defeat.
It is usually not wise to fight it unless you have a Steel Knight a Rainbow Wizard or a Brainy Doctor because the rainbow wizard and brainy doctor can stun and you can easily send in the steel knight. There is also a mission where you can fight a big boned Onii where it is surrounded by pieces of cake and is significantly stronger with a larger health.