kung fu panda cheats, i found some, but how do i enter them?

i’m the 34 year old mom of an amazing eight year old kid. he got the kung fu panda game for his birthday and we found some cheats online. they are like: left, down, right, down and stuff. well, he wants me to help him use them, but my real experience was with ataris (if you get my drift) other than a few battles on star wars legos, i’m at a loss as what screen i plug them into. i know what to push on the control. just not which screen in the pause menu or if i should even be in the pause menu. i don’t see a “enter cheats here” sort of thang. any help would be much appreciated. may the force be with you.

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