Click "Open ROM" and select your decrypted Pokﾃｩmon X/Y file.
To randomize Pokﾃｩmon X or Y (Gen 6), you can use the following tools: Universal Pokﾃｩmon Randomizer ZX Pokemon X And Y Randomizer Rom Download
to see an experimental branch that adds extra features like Pokﾃｩmon palette randomization. Are you planning to play this on an like Citra or on an actual 3DS console pk3DS: Pokﾃｩmon 3DS ROM Editor and Randomizer Click "Open ROM" and select your decrypted Pokﾃｩmon X/Y file
Finding a direct "download" for a randomized Pokﾃｩmon X or Y ROM is difficult because sharing pre-randomized ROM files is generally illegal and against many site policies. Instead, the standard and safest method is to download a randomizer tool and apply it to a copy of your own game file Recommended Randomizer Tools Pokemon X And Y Randomizer Rom Download