>>52348764paradox pokemon are considered to be monsters because they're significantly more violent and powerful than that of normal pokemon, especially given the mention of a human getting fatally wounded by one and Arven's Mabosstiff presumably being crippled by another.
Kyurem in BW2 was given a similar label of monster by characters in the world for having displayed unnaturally violent behavior in the past.
even in general fantasy the line between monster and animal blurs a lot, with some creatures that are for all intents and purposes just big, dangerous animals getting the label of monster because of their threat levels.
