Oranda. try Owtwo, Aqua, Overbite or Gator for feraligatr
for Weepinbell i suggest Flora(female) flytrap(male)
Suicune: again owtwo, aqua, Araura, or North
Gyarados: Kraken or Redkraken(if shiny)
Halo or Cobalt for Lugia
It sounds like that is the traded farfetch'd from Red/Blue, but I like Dux...