Mettaton Ex

Mettaton Ex is a boss that can be found at the core

His love requirement is 16 and is the 4th main boss

in the game

 Statistics 

Mettaton Ex only has 3 attacks but does

15 damage. Mettaton has a lot of heath being more

than double of undyne

 Trivia 

Mettaton is one out of two monsters that drop justice soul

Mettatons difficulty is hard

Mettatons gold is similar to undyne's