The is not just a download; it is a subscription to infinite replayability. That $40 cartridge you bought in 2007 can now generate thousands of hours of fresh content.
Randomizers force you to use Pokémon you would normally ignore. You might find yourself relying on a Farfetch'd with an overpowered moveset or a early-game Slaking that lacks its negative "Truant" ability. Step-by-Step Guide to Getting a Pokémon Diamond Randomizer
A randomizer is a tool that modifies a Pokémon game’s internal data to change various aspects of gameplay. For Pokémon Diamond , a randomizer can alter just about everything—starter Pokémon choices, wild Pokémon encounters, trainer battle teams, items scattered around Sinnoh, and even Pokémon movesets, types, and abilities. The result is a completely unpredictable adventure where you never know what you might encounter next.