>>45172588人(ひと)と: with a person/human
結婚(けっこん)した: got married
ポケモンがいた: there were Pokémon
ポケモンと: with a Pokémon
結婚(けっこん)した: got married
人(ひと)がいた: there were people/humans
昔(むかし)は: long ago
人(ひと)もポケモンも: humans and Pokémon
同(おな)じだったから: because they were the same
普通(ふつう)の事(こと)だった: it was a normal thing