You know, I'm not sure if we have a glossary of sorts for the items here other than the bare-bones information we have here. But I asked Lady Vulpix for you, so hopefully she'll be able to give us an answer on this sooner or later.

Your MP (I'm presuming you're going with X/Y Pokemon, correct?): Medicham, Aipom, Mudkip, Squirtle, Ledian, Vanillite, Golbat, Luvdisc, Steelix, Landorus, Heatmor, Eelektrik, Druddigon, Glalie

GT!: This is the only Pokemon that can learn more than one OHKO move via level-up.