doesn't bowser have 8 kids
Yes and no.
Original canon? ? All 7 Koopalings plus Junior are Bowser’s kids.
Post 2012-2013 canon? ? Only Junior is Bowser’s child. Miyamoto retconned the original canon and made it so the Koopalings are just 'underlings'
---- everyone ignores this new canon because it fucking sucks and we all want Bowser to still have 8 kids.