"Moral Dilemma"

Ive had a bronzong on my team in the game im playing, (Pokemon Reborn) and i need some help. i have emotional attachment to it considering ive had it since the 2nd gym. (I just beat the seventh) and i found a shiny gastly. Should i replace bronzong with gastly since gengar is stronger (and shiny so bonus points) or should i keep bronzong due to emotional attachmentEdit: his name is pennsylvania. that adds nothing but i think its a good name via /r/pokemon https://ift.tt/aQy2jEw