TM - Retaliate

The user gets revenge for a fainted ally. If an ally fainted in the previous turn, this attack’s damage increases.

TM - Retaliate is a Technical Machine in PokeMMO: it teaches a move to a compatible Pokémon.

How to get TM - Retaliate in PokeMMO

TM - Retaliate can be bought on the GTL, for about $16,000 right now.