Which page no. and address are they in the cart? I'll let you know the best spot for extra code based on that.
oops, that poke I just wrote is no good as the game won't start, it has to be entered after
Looks like there's an existing trainer on cpc-power you could use? Otherwise I can write a patch.
It's more complicated
First you have to change this:
&CD, &16, &85
&CD, &20, &85
And after:
&3A,&DE,&99,&FE,&02,&D8,&AF,&CD,&1E,&BB,&20,&27,&3E,&02,&CD,&1E,&BB,&C8,&3E,&02,&CD,&1E,&BB,&20,
&F9,&3A,&DF,&99,&3D,&FE,&FF,&20,&02,&3E,&05,&32,&DF,&99,&4F,&06,&00,&21,&E0,&99,&09,&7E,&B7,&28,
&E8,&18,&1D,&AF,&CD,&1E,&BB,&20,&FA,&3A,&DF,&99,&3C,&FE,&06,&20,&01,&AF,&32,&DF,&99,&4F,&06,&00,
&21,&E0,&99,&09,&7E,&B7,&28,&E9
By this:
&32,&DF,&99,&4F,&06,&00,&21,&E0,&99,&C9,&3A,&DE,&99,&FE,&02,&D8,&3E,&30,&CD,&1E,&BB,&20,&21,&3E,
&31,&CD,&1E,&BB,&C8,&3E,&31,&CD,&1E,&BB,&20,&F9,&3A,&DF,&99,&3D,&FE,&FF,&20,&02,&3E,&05,&CD,&16,
&85,&09,&7E,&B7,&28,&EE,&18,&18,&3E,&30,&CD,&1E,&BB,&20,&F9,&3A,&DF,&99,&3C,&FE,&06,&20,&01,&AF,
&CD,&16,&85,&09,&7E,&B7,&28,&EF