Minecraft is no stranger to player-made modifications. From the game’s inception, players have been taking the code and customizing it to do new things.

Click on the one that says, ".minecraft," and right click the row of folders. Create a new folder that's titled, "mods," in all lowercase, this is where the player will put the mod for Pixelmon.

These are called mods, and they can completely change how you play Minecraft. A quick note on what mods actually do: Mods fundamentally change how Minecraft operates by manipulating the game's files.

3. Open the .minecraft folder and, inside it, the bin folder. 4. Back the existing Minecraft.jar for when you want to upgrade back to 1.3.2, then copy and replace the 1.2.5 jar file into the bin ...