During the Cell saga the part where you must kill 6 cell jrs. The infinite health allies is bugged.
It causes the Cell Jrs. in the first part (yamcha, and tien vs Cell Jrs.) and in the second part (Evil Gohan vs Cell and Cell jr.) to become immortal. Noted only affects Cell Jrs. not Cell.
In the prior battle where you fight hercule and goku is your ally fighting cell the cheat works fine. However, it does not deactivate x.x...
Even trying to deactivate it during the battle with cell jrs. did not seem to work properly... Not until Gohan was near death...
Deactivating health during battle will not work. It has to be before the battle starts.