Oh, you'd like each Poke'mon to do a flourish animation after winning a battle? Ok then. Start animating a thousand creatures.
Just as there are one set of animations for human models in other games, each individual pokemon would not need to be animated by hand. They'd be split into groups for animations based on body shape.
These animations wouldn't be used in just one game either, they'd be used in every future pokemon game. From Mobile to Console, From Mystery Dungeon, Stadium, RPG, Let's Go and any other pokemon game.
This isn't workload to attribute to a single game, this is work that can be used in every pokemon game for years to come.
LTD: PS4 - 125m, Switch - 110m, XBO - 51m
2020: PS4 - 9m, Switch - 22.5m, XBO - 2.5m, PS5 - 4.5m, XBX - 2.8m