I used this strategy in Wadolf: Don't try to kill the zombies, Wadolf will just make them more, try to avoid them. Wait until Wadolf got a blue glow and then go fast up or down to dodge his lazor. Now, go behind him and use bomb or if you haven't any, start spamming A behind him and wait 'til he can take damage again. Then hit him up into air and try to juggle him as much as possible. If you try to throw bombs randomly, they'll probably miss. Also, if Wandolf wants to melee you, melee him back. Try to avoid jumping. I used that and I've beat the game twice.
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