If you have 2 familiars out and one is a Healer beware. If the non-healer goes from low health to dead the game will freeze up entirely. This is due to your healer attempting to heal the monster before it knew it was dead causing the glitch. If you try to Roche Fruit a monster and it happens to be a Manoeva in disguise your game will freeze up and the curse of the Manoeva will haunt you again. Power Frogs Frogs are light weight.
Some monsters are heavy weight.
If you pick up a frog that is a heavy monster and it then transforms back to its normal heavy state, not only will your hero not seem buff, your game will freeze to add to his humiliation. This will send an interruption to the program and with any luck when you close it back up the interrupt may return your playstation to a state that is not caught in an infinite loop. To prevent some of these bugs the newer versions of the playstations that contation dual shock compatibility seem to crash less often as their architecture is more advanced and can handle situations more gracefully.