How to overwrite WorldGenPumpkin without editing any base classes?

[TorchicBlaziken]

If I were satisfied with letting my mod go in the jar instead of the mods folder, I would release it now. But there is one base class that I still haven't found out how to get away with not editing. I've made the game load a custom class in place of BlockPumpkin, but I don't know how to do the same with WorldGenPumpkin.

[Kinyoshi]

This actually got me thinking about my mods and the way they replace vanilla blocks to get small results. I'm thinking of making new blocks that spawn alongside the vanilla ones so no base classes get changed, and it makes my stuff.

 

Just a  thought, thanks for wondering this because you solved my problem .

[OvermindDL1]

Java Reflection.