Is this a glitch, I can walk throught the thrid tree (bottom) and the forth tree (top) in the Giant Chasm?

Question

I don't not hack but my game has froze a few times.

Answer 1

It's a glitch. A known one. It does not seem to cause damage...

Source

Comments

You're too fast.

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The day I outype you Mew... will be a day I will never see.

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Everybody sees that day, but never lives that day. xD

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xD (filler)

Answer 2

Yes, this glitch has been reported before.
http://bulbapedia.bulbagarden.net/wiki/List_of_glitches_in_Generation_V#Giant_Chasm_glitch