The Ground Map is a map within the Pokemon Crater - Battle Arena game. It can be unlocked with 10 credits.This map consists of large amounts of common Pokemon, which makes it harder for players to encounter a rare Pokemon. Pokemon available in the map : 1.Phanpy ( common ) 2.Sandshrew ( common ) 3.Nincada ( common ) 4.Wooper ( common ) 5.Rhyhorn ( common ) 6.Baltoy ( common ) 7.Numel ( common ) 8.Swinub( common ) 9.Geodude( common ) 10.Onix ( common ) 11.Trapinch ( common ) 12. Barboach ( common ) 13. Cubone ( common ) 14.Diglett ( uncommon) 15.Larvitar ( uncommon ) 16. Gligar ( uncommon ) 19.Groudon ( rare )