Missing maps:
Kanto: Sevii Islands
Johto: Burned Tower, Bellchime Trail, Bell Tower, Cliff Edge Gate, Route 47, Cliff Cave, Route 48, Safari Zone Gate.
Ideas for maps:
Dragons Den B1F:
Walking: Zubat - Common, Wooper - Common, Quagsire - Rare, Raticate - Rare, Crobat - Very Rare, Onix - Very...