Answer:
I am an English word with 3 consecutive double letters.
I am not very commonly found! Only in some rainforest! I have an odd number of toes! I'm very lazy and hang upside down!
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes. What am I?
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
I store fire-breathing animals.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?