Pokémon Diamond Version, Pearl Version, and Platinum Version - Terrain
For the purposes of Burmy’s form change, Camouflage, Nature Power, and Secret Power, Gateway Colosseum is treated as "water"; Courtyard, Main Street, and Neon Colosseums are treated as "elsewhere"; Sunset Colosseum is treated as "other outdoor ground"; Waterfall and Sunny Park Colosseums are treated as "tall grass"; and Crystal, Magma, and Stargazer Colosseums are treated as "rocky ground".
Fishing is treated as "water". The Distortion World and Kanto’s Cycling Road are treated as "elsewhere."