work it out, id love to help you but i also know how fun it is making your own team, togekiss is obviously your favourite, hes weaknesses are ice,electric and rock so your next pokemon you choose should resist as many of these as possible, as metagross already resist ice and rock and is hit neutral by electric, then you need to cover him for fire and ground, which i suggest gyarados, then hes weakness is electric along with togekiss's, so i suggest a lead swampert like mine its immune and only weakness is grass, so id suggest something like bronzong, it has 8 resistances and 1 immunity, one being grass, then for the 6th a suggest a choice scarfed revenge killer, flygon most likely
ok i got carried away after i said work it out lol