4th Gen need help for my platinum team

i'm in hearthome city and my team is:
gortle lvl 24
buneary lvl 25
psyduck lvl 24
drifloon lvl 26
and i want to add ralts(female) and riolu and houndour and togepi
can you help me to decide what should i do .. i'm confused please help ~_~
(i think i need a water type instead of psyduck .. right??)

Hey there! We actually have a thread just for in-game Pokemon team help. Try posting over there for some advice. Don't forget to include movesets so members can see what attacks your team has to see what you have covered.