I Get in the room with big spikes ...they are everywhere....I saw in a movie that u can transform into bat....can someone tell me how do i get bat transformation plz?

OK, first either defeat Zypher in the cursed clocktower or equip the highest level knife weapon, Cinquellida I think it's called.

If you choose to defeat Zypher then take him out and find the room with a canon starting to blast it's way through a pillar and it freezes in time. Use the Zypher soul to unfreez the canon ball and walk your way through until you find a boss door. That door will lead you to the bat company. It will change you to a bat.

If you choose the other route, equip the Cinquella and head for Subterranian Hell. Go to the bottom of the map as far as you can and you will find a door with a switch on the other side. Use the special attack and you will flash past the wall and step on the switch that leads to the Silenced Ruins. Use the same process to reach the boss door and fight to win against bat comapany.