>>51484530 In the start, like us, rellied entirely on formations, overwhelming numbers & artillery fire, as communication over long distances was not reliable all the time (even with flying type pokemon, it takes some time).
When telecomunications are developed, warfare becomes more small operations based & with more fast & hard hitting 'mons, maybe a couple of disruptors here & there, & the big bulky monsters stay in cities & imprtant areas to guard & protect.