Excitable Boy
is a metaphor
I especially loved this aspect of these games! Especially when mewtwo pulled out his original red and blue moveset, I nearly screamed!
It's close to the same set, but not quite; RBY Mewtwo came with Swift/Psychic/Barrier/Recover, whereas XY Mewtwo comes with Recover/Psychic/Barrier/Aura Sphere.