Gen 1 Suddenly Becomes Unlegal Due to Forget Moves

[PKHex_User]

As I heard HM cannot be learned when migrate PM, so I forgeted HMs, and it stayed fine for previous version of PKHex. But for now it starts to say not learning all 4 moves is inlegal, while in game it is legal to forget some moves by move deleter

[theSLAYER]

2 minutes ago, PKHex_User said:

As I heard HM cannot be learned when migrate PM, so I forgeted HMs, and it stayed fine for previous version of PKHex. But for now it starts to say not learning all 4 moves is inlegal, while in game it is legal to forget some moves by move deleter

I'm assuming your Venusaur still has the same catch rate, indicating it wasn't traded.

[PKHex_User]

Just now, theSLAYER said:

I'm assuming your Venusaur still has the same catch rate, indicating it wasn't traded.

What does this mean? It says Move is the only error

[theSLAYER]

7 minutes ago, PKHex_User said:

What does this mean? It says Move is the only error

If a mon was never traded to Gen 2, it cannot have a move removed. There is no move deleter in Gen 1

How PKHeX can recognize "was it traded before", is by checking the Catch Rate.

Certain Catch rates change value when traded to Gen 2 and back, due to how some values don't match up held items in Gen 2, so Gen 2 changes them to proper held items upon receiving them.

Try dragging your Venusaur between 2 PKHeX windows, one for Gen 1, and one for Gen 2, you can observe in real time.