I love this game but I can't find out certain things: 1) How do I get..

question ( 4 )
you need the wolfs foot relic to get across the bridge.
it makes you run faster and you dont need to kill a monster to get it!

Question ( 3 )

Get the fire whip, and the ice whip,
hit the statue with the fire whip till it turns red, then hit with the ice whip to crack it open!

7) optional bosses in the anti-soul mystery labs, the dark palace of waterfalls and the garden forgotten by time
Fire whip is answered by me somewhere on this same page,
Ice whip is dark palace of waterfalls, near the beginning there is a wall with a door like carving in it, and when you approach it a heavy armour appears behind you, lure the armour towards the wall, and wait until he swings, dodge it and he will hit the wall and open it, don't worry if you can't dodge it, it will still open the door, follow this path until you reach what seems like a dead end, jump down the bottom of the canyon thing, for $1000 and then go up to the door level and then only one more up, face out from the ledge and double jump and then swing your whip, leon should grav onto a railing from here, then go up one more level, you should be able to see the platform, and then jump out over where you jumped from to grab the rail(if more explanation is needed email me at [email protected]) and if all goes well you will be standing on a pillar, from here the rest of the path should be obvious, go up until you see a green 'boss' door; it has a skull design on it, go in, and a boss fight will follow, kill her to get the ice whip.
Thunder whip, in the garden forgotten by time, somewhere near the end, you will see a door on the map in one of the rooms with the man eating plant enemy, lure the plant under the door and hit it with your whip, eventually it will open and you can jump on it, there are two instances that you can do this, one the door is in the middle of a wall, another the door is in the corner, one of them contains the path towards the boss that has the lightning whip, you will know it by the spiral staircase, explore all the paths and you will find it, kill the boss and get the whip
I hope this helps

Question 5) use the fire whip on it

Question 6) near the ice whip boss is another rollercoaster minigame, go through this and you will end up on the bottom floor(directions to the ice boss in answer to question 7)

Question 8) across the crumbling bridge in anti soul mystery labs, you need the wolf foot to get across.

1) in the rooms that contain men-eating flowers there are balconies, to reach them you have to get the flowers on close distance from the balconies and hit them with the whip until they open and then you can use them to jump reach these doors.

2)In the room where there is a high balcony with a broken piece on the floor.
After you pass the door you'll easily find the switch in far left room.

5)you'll need the fir ewhip to melt the ice.

10)the red phoenix key is in the garden behind the second locked door

11)the white tiger key s in the second locked door of the house of sacred remains..

Hope it will help you!^_^

Answer to question 6.... Yes the only way to get back is to go in the room where the Knight with the large mace knocked a hole in the wall and take the skull mouth door and use the rail ride back. The rail ride will dump you back into one of the switch rooms where you changed the flow of the water.