Emulation itself is legal. Downloading ROMs is not. Here is the :

If you are looking for **"Pokémon Omega Ruby 1.4 DS

Many Spanish-speaking fans still search for "DS ROMs" because the original Pokémon Ruby (2003) was for the Game Boy Advance, and Pokémon Diamond/Pearl (2006) were for the DS. However:

: You must have this update installed to access online features such as: Wonder Trade and Global Trade Station (GTS). Mystery Gift redemption. Player Search System (PSS) and Game Sync. Spanish Language Support : The Spanish version of the update (approximately

Version 1.4 was a mandatory update for players wishing to access online features like trading and battling via the .